Reference:6536-1 - Revision history

Admin: Resize hero: 340px -> 250px

2026-04-30T04:22:57Z

Resize hero: 340px -> 250px

← Older revision		Revision as of 04:22, 30 April 2026
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	The 6536/1 is the caseback-identified sub-variant of the [[Reference:6536\|6536]]: same late-1950s small-crown no-crown-guard case, same caliber 1030, same 100m depth rating. The /1 suffix is a caseback engraving update on an otherwise identical reference — case, dial-text variants, bezel insert, bracelet, movement, crown, and case dimensions all overlap with the parent 6536. A portion of the 6536/1 run was submitted for chronometer certification and carries a four-line dial with "Officially Certified Chronometer" added above the depth-rating line. The caseback engraving, stamped 6536/1 rather than 6536, is the standard identifier — everything else is shared with the parent reference.		The 6536/1 is the caseback-identified sub-variant of the [[Reference:6536\|6536]]: same late-1950s small-crown no-crown-guard case, same caliber 1030, same 100m depth rating. The /1 suffix is a caseback engraving update on an otherwise identical reference — case, dial-text variants, bezel insert, bracelet, movement, crown, and case dimensions all overlap with the parent 6536. A portion of the 6536/1 run was submitted for chronometer certification and carries a four-line dial with "Officially Certified Chronometer" added above the depth-rating line. The caseback engraving, stamped 6536/1 rather than 6536, is the standard identifier — everything else is shared with the parent reference.

	[[File:Ref_6536-1_hero.jpeg\|thumb\|right\|~~340px~~\|alt=Rolex 6536/1 small-crown Submariner\|Rolex 6536/1 small-crown Submariner]]		[[File:Ref_6536-1_hero.jpeg\|thumb\|right\|250px\|alt=Rolex 6536/1 small-crown Submariner\|Rolex 6536/1 small-crown Submariner]]

	==Core facts==		==Core facts==

Admin: Fix 6536-1 caliber framing: A-series Perpetuals are full-rotor uni-directional, not bumper. 1030 introduces bidirectional winding

2026-04-29T23:46:20Z

Fix 6536-1 caliber framing: A-series Perpetuals are full-rotor uni-directional, not bumper. 1030 introduces bidirectional winding

← Older revision		Revision as of 23:46, 29 April 2026
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	==Movement notes==		==Movement notes==

	Caliber 1030 is confirmed across the 6536/1 corpus. Specifications: 25 jewels, 18,800 vph, ~42-hour reserve, 28.5 × 5.85mm, monometallic balance, blue Breguet overcoil. The 1030 is Rolex's first bidirectional automatic, introduced in 1950 — the architecture that ~~replaced~~ the ~~bumper movements~~ of the ~~earliest~~ Submariners. The butterfly rotor is stamped ROLEX PERPETUAL PATENTED.		Caliber 1030 is confirmed across the 6536/1 corpus. Specifications: 25 jewels, 18,800 vph, ~42-hour reserve, 28.5 × 5.85mm, monometallic balance, blue Breguet overcoil. The 1030 is Rolex's first bidirectional automatic, introduced in 1950 — the butterfly-rotor architecture that succeeds the thicker uni-directional A-series Perpetuals (A260 / A290 / A295 / A296) of the early Submariners. The A-series itself is full-rotor, not bumper; Rolex never produced a bumper caliber. The butterfly rotor is stamped ROLEX PERPETUAL PATENTED.

	Chronometer-certified (OCC) and non-certified versions both exist within the 6536/1 family on the same base caliber. The split is a certification distinction, not a mechanical one — some movements were sent for chronometer rating and some were not. The Sotheby's December 2018 lot 252 caseback is stamped 6536/1 with III.57 (third quarter 1957) on a chronometer-rated four-line dial example; non-chronometer 6536/1 examples surface across the same period with the standard two-line dial.		Chronometer-certified (OCC) and non-certified versions both exist within the 6536/1 family on the same base caliber. The split is a certification distinction, not a mechanical one — some movements were sent for chronometer rating and some were not. The Sotheby's December 2018 lot 252 caseback is stamped 6536/1 with III.57 (third quarter 1957) on a chronometer-rated four-line dial example; non-chronometer 6536/1 examples surface across the same period with the standard two-line dial.

Admin: Audit: strip project-memo register (Capture as, pending corroboration, awaiting source confirmation, Treat as) — reader-facing rephrase

2026-04-29T23:26:47Z

Audit: strip project-memo register (Capture as, pending corroboration, awaiting source confirmation, Treat as) — reader-facing rephrase

← Older revision		Revision as of 23:26, 29 April 2026
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	* '''Three-line''': transitional between two-line and four-line. Documented but rare.		* '''Three-line''': transitional between two-line and four-line. Documented but rare.

	An "invert" dial variant has been documented in collector forum sources, where the dial text reverses the standard layout. Surviving examples are extremely scarce; ~~treat as~~ a rare sub-variant ~~pending corroboration in~~ major-house ~~lots~~.		An "invert" dial variant has been documented in collector forum sources, where the dial text reverses the standard layout. Surviving examples are extremely scarce; a rare sub-variant without major-house corroboration.

	==Case, bezel, crystal, and crown==		==Case, bezel, crystal, and crown==

Admin: Audit: strip research-scaffold corpus tokens (surveyed corpus, auction-house corpus, consulted source) — reader-facing rephrase

2026-04-29T21:44:24Z

Audit: strip research-scaffold corpus tokens (surveyed corpus, auction-house corpus, consulted source) — reader-facing rephrase

← Older revision		Revision as of 21:44, 29 April 2026
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	==Production outline==		==Production outline==

	The 6536/1 ran 1955 to 1959 across ~~the auction~~-house ~~corpus~~. Hard caseback evidence anchors the late-1955 introduction: a Q4-1955 caseback ("4 55") on case 112,256 and an IV.55 caseback on case 112,341 are both 6536/1 stamps. Mid-run examples carry caseback codes I.57, II.56, II.57, and III.57 across cases 155,502 / 229,640 / 306,989 / 30x,xxx; late-run examples extend into 1959 with cases in the 39x,xxx range.		The 6536/1 ran 1955 to 1959 across major-house lots. Hard caseback evidence anchors the late-1955 introduction: a Q4-1955 caseback ("4 55") on case 112,256 and an IV.55 caseback on case 112,341 are both 6536/1 stamps. Mid-run examples carry caseback codes I.57, II.56, II.57, and III.57 across cases 155,502 / 229,640 / 306,989 / 30x,xxx; late-run examples extend into 1959 with cases in the 39x,xxx range.

	The parent 6536 and the 6536/1 ran concurrently rather than sequentially within the 1955-1959 window. Caseback engraving, not the calendar date, decides which variant a given example belongs to. The 2024 Rolex archive analysis gives the parent 6536 a total of 5,350 pieces 1955-1959 — 44% of the 12,144 total no-crown-guard Submariners across the five references (6200, 6204, 6205, 6536, 6538). No separate 6536/1 vs parent 6536 production split is published.		The parent 6536 and the 6536/1 ran concurrently rather than sequentially within the 1955-1959 window. Caseback engraving, not the calendar date, decides which variant a given example belongs to. The 2024 Rolex archive analysis gives the parent 6536 a total of 5,350 pieces 1955-1959 — 44% of the 12,144 total no-crown-guard Submariners across the five references (6200, 6204, 6205, 6536, 6538). No separate 6536/1 vs parent 6536 production split is published.
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	* '''Three-line''': transitional between two-line and four-line. Documented but rare.		* '''Three-line''': transitional between two-line and four-line. Documented but rare.

	An "invert" dial variant has been documented in collector forum sources, where the dial text reverses the standard layout. Surviving examples are extremely scarce; treat as a rare sub-variant pending corroboration in ~~the auction~~-house ~~corpus~~.		An "invert" dial variant has been documented in collector forum sources, where the dial text reverses the standard layout. Surviving examples are extremely scarce; treat as a rare sub-variant pending corroboration in major-house lots.

	==Case, bezel, crystal, and crown==		==Case, bezel, crystal, and crown==
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	The bezel evolution within 1957 alone is the cleanest single dating tool on a 6536/1. The earliest 1957 examples carry a silver triangle at twelve with no minute hash marks across the first fifteen minutes — the cleanest and earliest layout. Mid-1957 production keeps the no-hash format but switches to a red triangle at twelve. Late 1959 production carries the red triangle alongside individual minute hash marks across the first fifteen minutes — the closest ancestor to the bezel that defines the 5512.		The bezel evolution within 1957 alone is the cleanest single dating tool on a 6536/1. The earliest 1957 examples carry a silver triangle at twelve with no minute hash marks across the first fifteen minutes — the cleanest and earliest layout. Mid-1957 production keeps the no-hash format but switches to a red triangle at twelve. Late 1959 production carries the red triangle alongside individual minute hash marks across the first fifteen minutes — the closest ancestor to the bezel that defines the 5512.

	The crown is the original single-coronet "Brevet" 6mm with double-lock. A three-dot crown on a 6536/1 is a service replacement. Quarterly inside-caseback stamps (Roman numeral quarter. two-digit year) date the case head — the format is consistent and reliable: IV.55, I.56, II.56, I.57, II.57, III.57 across ~~the surveyed corpus~~.		The crown is the original single-coronet "Brevet" 6mm with double-lock. A three-dot crown on a 6536/1 is a service replacement. Quarterly inside-caseback stamps (Roman numeral quarter. two-digit year) date the case head — the format is consistent and reliable: IV.55, I.56, II.56, I.57, II.57, III.57 across documented examples.

	==Bracelets, end links, clasps, and packaging notes==		==Bracelets, end links, clasps, and packaging notes==
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	Three documented original-delivery bracelet families. The 6636 expandable rivet Oyster with end-link 65 or 80 is the most common period-correct delivery. The 7206 fixed-link rivet Oyster with end-link 80 is documented on Q2 1956 examples. The Jubilee 62510 surfaces on at least one Q4 1955 example with a clasp stamped 1960 — period-fitted but unusual rather than standard original-delivery configuration.		Three documented original-delivery bracelet families. The 6636 expandable rivet Oyster with end-link 65 or 80 is the most common period-correct delivery. The 7206 fixed-link rivet Oyster with end-link 80 is documented on Q2 1956 examples. The Jubilee 62510 surfaces on at least one Q4 1955 example with a clasp stamped 1960 — period-fitted but unusual rather than standard original-delivery configuration.

	End-link "65" is the small-crown standard across ~~the~~ documented ~~corpus~~; end-link "80" appears on later 1959 examples and post-Submariner-line bracelets. Rivet bracelet survival is its own collecting category — an original undisturbed rivet bracelet on a 6536/1 adds materially to completeness, and dealers and owners replaced rivet bracelets across decades of service.		End-link "65" is the small-crown standard across documented examples; end-link "80" appears on later 1959 examples and post-Submariner-line bracelets. Rivet bracelet survival is its own collecting category — an original undisturbed rivet bracelet on a 6536/1 adds materially to completeness, and dealers and owners replaced rivet bracelets across decades of service.

	==Authentication==		==Authentication==

Admin: Slop Cop scrub: strip represents/serves as/stands as/constitutes/encompasses, establishes, reflects, fundamentally, completely different/distinct, pivotal, robust, essentially, AI section-title patterns + transitional connectives. Per CLAUDE.md WRITING_STYLE.md banlist + user feedback on AI cadence.

2026-04-29T16:42:12Z

Slop Cop scrub: strip represents/serves as/stands as/constitutes/encompasses, establishes, reflects, fundamentally, completely different/distinct, pivotal, robust, essentially, AI section-title patterns + transitional connectives. Per CLAUDE.md WRITING_STYLE.md banlist + user feedback on AI cadence.

← Older revision		Revision as of 16:42, 29 April 2026
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	<small>[[Reference:submariner\|Submariner]] -> [[Reference:6536\|6536]] -> '''6536/1'''</small>		<small>[[Reference:submariner\|Submariner]] -> [[Reference:6536\|6536]] -> '''6536/1'''</small>

	The 6536/1 is the caseback-identified sub-variant of the [[Reference:6536\|6536]]: same late-1950s small-crown no-crown-guard case, same caliber 1030, same 100m depth rating. The /1 suffix is a caseback engraving update on an otherwise identical reference — case, dial-text variants, bezel insert, bracelet, movement, crown, and case dimensions all overlap with the parent 6536. A portion of the 6536/1 run was submitted for chronometer certification and carries a four-line dial with "Officially Certified Chronometer" added above the depth-rating line. The caseback engraving, stamped 6536/1 rather than 6536, is the ~~definitive~~ identifier — everything else is shared with the parent reference.		The 6536/1 is the caseback-identified sub-variant of the [[Reference:6536\|6536]]: same late-1950s small-crown no-crown-guard case, same caliber 1030, same 100m depth rating. The /1 suffix is a caseback engraving update on an otherwise identical reference — case, dial-text variants, bezel insert, bracelet, movement, crown, and case dimensions all overlap with the parent 6536. A portion of the 6536/1 run was submitted for chronometer certification and carries a four-line dial with "Officially Certified Chronometer" added above the depth-rating line. The caseback engraving, stamped 6536/1 rather than 6536, is the standard identifier — everything else is shared with the parent reference.

	[[File:Ref_6536-1_hero.jpeg\|thumb\|right\|340px\|alt=Rolex 6536/1 small-crown Submariner\|Rolex 6536/1 small-crown Submariner]]		[[File:Ref_6536-1_hero.jpeg\|thumb\|right\|340px\|alt=Rolex 6536/1 small-crown Submariner\|Rolex 6536/1 small-crown Submariner]]
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	==The /1 suffix==		==The /1 suffix==

	Rolex used numeric suffixes (/1, /2, etc.) to flag a caseback engraving update inside an existing reference — a tracked variant rather than a new reference number. The 6536 and the 6536/1 share the case, the production period, the caliber, the dial-text variants, the bezel inserts, the bracelet options, and the case dimensions. The caseback is the only ~~definitive~~ distinction.		Rolex used numeric suffixes (/1, /2, etc.) to flag a caseback engraving update inside an existing reference — a tracked variant rather than a new reference number. The 6536 and the 6536/1 share the case, the production period, the caliber, the dial-text variants, the bezel inserts, the bracelet options, and the case dimensions. The caseback is the only standard distinction.

	A caseback engraved "6536/1" in full belongs to the sub-variant; a caseback reading "6536" alone belongs to the parent. Both stampings exist on cases produced in the same period — the parent 6536 stamp continues to appear well into the 6536/1 era. The 6536/8 transitional variant (with crossed-out "6538" engraving and "6536" re-engraved over the strikethrough) is documented separately on the parent reference page; it is its own subvariant rather than a 6536/1 ancestor.		A caseback engraved "6536/1" in full belongs to the sub-variant; a caseback reading "6536" alone belongs to the parent. Both stampings exist on cases produced in the same period — the parent 6536 stamp continues to appear well into the 6536/1 era. The 6536/8 transitional variant (with crossed-out "6538" engraving and "6536" re-engraved over the strikethrough) is documented separately on the parent reference page; it is its own subvariant rather than a 6536/1 ancestor.
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	The bezel evolution within 1957 alone is the cleanest single dating tool on a 6536/1. The earliest 1957 examples carry a silver triangle at twelve with no minute hash marks across the first fifteen minutes — the cleanest and earliest layout. Mid-1957 production keeps the no-hash format but switches to a red triangle at twelve. Late 1959 production carries the red triangle alongside individual minute hash marks across the first fifteen minutes — the closest ancestor to the bezel that defines the 5512.		The bezel evolution within 1957 alone is the cleanest single dating tool on a 6536/1. The earliest 1957 examples carry a silver triangle at twelve with no minute hash marks across the first fifteen minutes — the cleanest and earliest layout. Mid-1957 production keeps the no-hash format but switches to a red triangle at twelve. Late 1959 production carries the red triangle alongside individual minute hash marks across the first fifteen minutes — the closest ancestor to the bezel that defines the 5512.

	The crown is the original single-coronet "Brevet" 6mm with double-lock. A three-dot crown on a 6536/1 is a service replacement. Quarterly inside-caseback stamps (Roman numeral quarter . two-digit year) date the case head — the format is consistent and reliable: IV.55, I.56, II.56, I.57, II.57, III.57 across the surveyed corpus.		The crown is the original single-coronet "Brevet" 6mm with double-lock. A three-dot crown on a 6536/1 is a service replacement. Quarterly inside-caseback stamps (Roman numeral quarter. two-digit year) date the case head — the format is consistent and reliable: IV.55, I.56, II.56, I.57, II.57, III.57 across the surveyed corpus.

	==Bracelets, end links, clasps, and packaging notes==		==Bracelets, end links, clasps, and packaging notes==

Admin: 6536-1: rebuild from research scout. Fix broken hero image alt text. Update production span 1957→1955-1959 with hard IV.55 / "4 55" caseback evidence on cases 112,341 + 112,256. Add 5,350 parent-6536 production figure (2024 Rolex archive analysis). Cal 1030: 25j 18,800 vph bidirectional Rolex first. Three bezel evolutions within 1957. Four dial-text layouts. 9-lot auction record. Attribution-light prose; no hammer/auction prices in body.

2026-04-29T15:35:24Z

6536-1: rebuild from research scout. Fix broken hero image alt text. Update production span 1957→1955-1959 with hard IV.55 / "4 55" caseback evidence on cases 112,341 + 112,256. Add 5,350 parent-6536 production figure (2024 Rolex archive analysis). Cal 1030: 25j 18,800 vph bidirectional Rolex first. Three bezel evolutions within 1957. Four dial-text layouts. 9-lot auction record. Attribution-light prose; no hammer/auction prices in body.

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Admin: SEO: og:image + image_alt + og_type + timestamps

2026-04-29T03:23:22Z

SEO: og:image + image_alt + og_type + timestamps

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	\|modified_time=2026-04-29T02:36:~~36Z~~		\|modified_time=2026-04-29T02:50:44Z
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Admin: SEO: og:image + image_alt + og_type + timestamps

2026-04-29T02:50:44Z

SEO: og:image + image_alt + og_type + timestamps

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Admin: SEO: og:image + image_alt + og_type + timestamps

2026-04-29T02:36:36Z

SEO: og:image + image_alt + og_type + timestamps

← Older revision		Revision as of 02:36, 29 April 2026
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	{{#seo:		{{#seo:
	\|title=Rolex 6536/1 — BezelBase		\|title=Rolex 6536-1 — Production, Dial Variants, Serial Ranges \| BezelBase
	\|description=The 6536/1 is the caseback-confirmed sub-variant of the late-1950s small-crown, no-crown-guard Submariner on caliber 1030. Some examples carry COSC chronometer certification and a four-line dial.		\|description=The 6536/1 is the caseback-confirmed sub-variant of the late-1950s small-crown, no-crown-guard Submariner on caliber 1030. Some examples carry COSC chronometer certification and a four-line dial.
	\|keywords=Rolex, 6536, 6536/1, Submariner, COSC, specifications, reference guide		\|keywords=Rolex, 6536, 6536/1, Submariner, COSC, specifications, reference guide
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	\|og_type=article		\|og_type=article
	\|published_time=2026-04-14T16:13:40Z		\|published_time=2026-04-14T16:13:40Z
	\|modified_time=2026-04-~~20T01~~:28:~~59Z~~		\|modified_time=2026-04-27T04:47:47Z
	\|robots=index,follow,max-image-preview:large		\|robots=index,follow,max-image-preview:large
	}}		}}

Admin: Slop sweep: paragraph challenge + AI-tone scrub

2026-04-27T04:47:47Z

Slop sweep: paragraph challenge + AI-tone scrub

← Older revision		Revision as of 04:47, 27 April 2026
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	<small>[[Reference:submariner\|Submariner]] → [[Reference:6536\|6536]] → '''6536/1'''</small>		<small>[[Reference:submariner\|Submariner]] → [[Reference:6536\|6536]] → '''6536/1'''</small>

	The 6536/1 is a caseback-identified sub-variant of the [[Reference:6536\|6536]] — same late-1950s small-crown, no-crown-guard case, same caliber 1030. ~~Within~~ the /1 run~~, a subset of examples~~ was submitted for COSC chronometer certification and carries a four-line dial ~~(the extra line being~~ "Officially Certified Chronometer" above the depth rating). The caseback engraving, stamped 6536/1 rather than 6536, is the definitive identifier.		The 6536/1 is a caseback-identified sub-variant of the [[Reference:6536\|6536]]: same late-1950s small-crown, no-crown-guard case, same caliber 1030. A portion of the /1 run was submitted for COSC chronometer certification and carries a four-line dial, with "Officially Certified Chronometer" added above the depth-rating line. The caseback engraving, stamped 6536/1 rather than 6536, is the definitive identifier.

	[[File:Ref_6536-1_hero.jpeg\|thumb\|right\|340px\|alt=Photo: [https://www.windvintage.com/rolex-small-crown-submariner-reference-65361-copy Wind Vintage\|Photo: [https://www.windvintage.com/rolex-small-crown-submariner-reference-65361-copy Wind Vintage]]]		[[File:Ref_6536-1_hero.jpeg\|thumb\|right\|340px\|alt=Photo: [https://www.windvintage.com/rolex-small-crown-submariner-reference-65361-copy Wind Vintage\|Photo: [https://www.windvintage.com/rolex-small-crown-submariner-reference-65361-copy Wind Vintage]]]
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	==Where it sits in the line==		==Where it sits in the line==

	The 6536/1 is the small-crown branch of the last no-crown-guard Submariner generation. It runs ~~opposite~~ the big-crown 6538 in the same ~~production~~ window, and ~~is the immediate predecessor of~~ the 5508, which carried the ~~same~~ small-crown case into the newer caliber 1530. ~~For~~ the ~~broader~~ context ~~(predecessor~~ 6205~~, successor 5508,~~ and the 5512 crown-guard transition in 1959~~), see the parent [[Reference:6536\|6536]] article~~.		The 6536/1 is the small-crown branch of the last no-crown-guard Submariner generation. It runs alongside the big-crown [[Reference:6538\|6538]] in the same window, and feeds directly into the 5508, which carried the small-crown case into the newer caliber 1530. The parent [[Reference:6536\|6536]] article covers the wider context, including the 6205 lineage and the 5512 crown-guard transition in 1959.

	==Production outline==		==Production outline==

	Documented 6536/1 examples run from 1957 to 1959~~. Production was~~ short~~, consistent with~~ the ~~rapid evolution of the Submariner during this period~~. The parent 6536 and the 6536/1 ran concurrently rather than sequentially~~, with the~~ caseback engraving — not the calendar date ~~— determining~~ which variant a given example belongs to.		Documented 6536/1 examples run from 1957 to 1959, a short window inside the broader 6536 production. The parent 6536 and the 6536/1 ran concurrently rather than sequentially. The caseback engraving, not the calendar date, decides which variant a given example belongs to.

	==Movement notes==		==Movement notes==

	Caliber 1030 is confirmed by [https://www.sothebys.com/en/auctions/ecatalogue/2018/important-watches-n09952/lot.252.html Sotheby's 2018 Lot 252], where the caseback is stamped 6536/1 III.57 (third quarter of 1957). The 1030 is a full-rotor automatic with a butterfly rotor, ~~a meaningful step forward from~~ the bumper movements (a rotor ~~that~~ oscillates between springs rather than rotating freely) ~~of the earliest Submariners~~.		Caliber 1030 is confirmed by [https://www.sothebys.com/en/auctions/ecatalogue/2018/important-watches-n09952/lot.252.html Sotheby's 2018 Lot 252], where the caseback is stamped 6536/1 III.57 (third quarter of 1957). The 1030 is a full-rotor automatic with a butterfly rotor, the architecture that replaced the bumper movements of the earliest Submariners (where the rotor oscillates between springs rather than rotating freely).

	~~A portion of 6536/1 examples was submitted for COSC certification.~~ COSC (Contrôle Officiel Suisse des Chronomètres) is the Swiss official chronometer testing body; certified watches meet defined accuracy tolerances and ~~are labelled~~ on the dial. ~~Both chronometer~~ and non-chronometer ~~versions run~~ the same base caliber 1030; the ~~distinction is a~~ certification path~~, not a mechanical one~~.		COSC (Contrôle Officiel Suisse des Chronomètres) is the Swiss official chronometer testing body; certified watches meet defined accuracy tolerances and carry the certification on the dial. Chronometer and non-chronometer 6536/1s share the same base caliber 1030; only the certification path separates them.

	==Dial map==		==Dial map==

	~~The~~ dial~~-map structure in~~ the ~~family history runs~~: early four-line layout, then red-triangle bezel ~~variants~~, then late hash-bezel production. ~~The four~~-line dials — "Oyster Perpetual / Officially Certified / Chronometer / Submariner" above the depth-rating line ~~— are~~ the COSC-certified examples~~, the cleanest tell for the chronometer branch~~. Non-COSC dials carry the standard three-line layout.		Three dial layouts appear across the run: an early four-line COSC layout, then red-triangle bezel pairings, then late hash-bezel production. Four-line dials read "Oyster Perpetual / Officially Certified / Chronometer / Submariner" above the depth-rating line and mark the COSC-certified examples. Non-COSC dials carry the standard three-line layout.

	~~Rolex Forum collectors have documented an~~ "invert" dial ~~on the 6536/1~~, where the dial text ~~is inverted from~~ the standard layout. ~~Documented~~ examples are extremely scarce and the configuration ~~is treated as a~~ rare ~~sub-variant~~.		An "invert" dial variant has been documented in collector forums, where the dial text reverses the standard layout. Surviving examples are extremely scarce and the configuration sits at the rare end of the 6536/1 catalog.

	==Case, bezel, crystal, and crown notes==		==Case, bezel, crystal, and crown notes==

	The 6536/1 is the slim, small-crown case of the late-1950s no-guard generation — the counterpart to the thicker, 8mm-Brevet-crown [[Reference:6538\|6538]]. ~~Forum research adds specificity~~ on ~~the bezel: red~~-triangle ~~examples~~ carry a red-painted triangle at twelve with minute hash marks running zero to fifteen~~, while a~~ no-hash ~~insert~~ variant omits the minute hash marks entirely~~. The~~ Wind archive example is the benchmark for ~~the no-hash~~ configuration.		The 6536/1 carries the slim small-crown case of the late-1950s no-guard generation, the counterpart to the thicker 8mm-Brevet-crown [[Reference:6538\|6538]]. Two bezel inserts appear on documented examples. Red-triangle bezels carry a red-painted triangle at twelve with minute hash marks running zero to fifteen. The no-hash variant omits the minute hash marks entirely; the Wind Vintage archive example is the benchmark for that configuration.

	==Bracelets, end links, clasps, and packaging notes==		==Bracelets, end links, clasps, and packaging notes==

	Sotheby's 2018 ~~Lot 252 gives the cleanest direct evidence with~~ a period rivet bracelet on the ~~watch.~~ Wind ~~adds an~~ archive example with an original Rolex stretch rivet bracelet dated to 1957. Both fitments are period-correct for ~~the 6536/1~~.		The Sotheby's 2018 lot wears a period rivet bracelet, and the Wind Vintage archive example pairs the watch with an original Rolex stretch rivet bracelet dated to 1957. Both fitments are period-correct for a late-1950s small-crown Submariner.

	==Special branches==		==Special branches==

	~~The two internal branches worth calling out are~~ the bezel ~~generations~~ and ~~the COSC split~~. ~~On bezels, the~~ red-triangle insert is the earlier and more collected configuration; the ~~later~~ hash-bezel ~~sits~~ at the end of the production run. On ~~movements~~, the COSC four-line ~~dial~~ is the less common of the two, and the ~~one~~ that has ~~produced~~ the strongest results ~~at auction~~ when ~~combined~~ with honest condition.		Two splits structure the 6536/1 catalog: bezel insert and dial certification. The red-triangle insert is the earlier and more collected configuration, with the hash-bezel sitting at the end of the production run. On the dial side, the COSC-certified four-line layout is the less common of the two, and the version that has set the strongest auction results when paired with honest condition.

	==Historical market and auction record==		==Historical market and auction record==

	Sotheby's 2018 Lot 252 is the strongest direct lot source and remains the world-record small-crown Submariner at USD 225,000 — a 1957 ~~watch~~, caseback stamped 6536/1 III.57, caliber 1030, descendants-of-original-owner provenance, unpolished, ~~with~~ the no-hashmark red-triangle bezel. Wind adds ~~an unusually~~ strong archive example with no-hash bezel and original 1957 bracelet; Grey and Patina ~~gives~~ a ~~second~~ sold ~~1958~~ example with red-triangle insert.		Sotheby's 2018 Lot 252 is the strongest direct lot source and remains the world-record small-crown Submariner at USD 225,000. The watch is a 1957 example, caseback stamped 6536/1 III.57, caliber 1030, with descendants-of-original-owner provenance, unpolished, and the no-hashmark red-triangle bezel. Wind Vintage adds a strong archive example with no-hash bezel and original 1957 bracelet; Grey and Patina records a 1958 sold example with the red-triangle insert.

	Three documented lots, each with distinct bezel, bracelet, and provenance ~~characteristics~~, give the 6536/1 a clearer market profile than ~~many~~ early Submariner references ~~can claim~~.		Three documented lots, each with distinct bezel, bracelet, and provenance, give the 6536/1 a clearer market profile than most early Submariner references.

	==Sources==		==Sources==