Reference:sea-dweller - Revision history

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2026-05-16T05:22:07Z

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Admin: Family cleanup: cross-family dedup + intra-article dedup + bold-strip + Slop Cop sweep

2026-05-16T03:49:40Z

Family cleanup: cross-family dedup + intra-article dedup + bold-strip + Slop Cop sweep

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	== Helium escape valve ~~— the line's defining feature~~ ==		== Helium escape valve ==

	The HEV sits at 9 o'clock on every Sea-Dweller. Swiss patent CH492246, filed 6 November 1967, granted June 1970. The concept emerged from SEALAB diver Bob Barth's feedback on lost crystals during chamber decompression. Helium dissolves through case gaskets at saturation pressure; on ascent, the trapped gas expands and pops crystals off the case if it cannot escape. The valve is a one-way spring-loaded relief mechanism: internal pressure above the spring threshold opens it, the spring re-seats against water and dirt ingress on the way back down.		The HEV sits at 9 o'clock on every Sea-Dweller. Swiss patent CH492246, filed 6 November 1967, granted June 1970. The concept emerged from SEALAB diver Bob Barth's feedback on lost crystals during chamber decompression. Helium dissolves through case gaskets at saturation pressure; on ascent, the trapped gas expands and pops crystals off the case if it cannot escape. The valve is a one-way spring-loaded relief mechanism: internal pressure above the spring threshold opens it, the spring re-seats against water and dirt ingress on the way back down.

	The 1665 carries the valve in its first generation. The 16660 enlarges it for the 1220-metre depth rating. The 16600 and 116600 inherit the larger valve~~. No Sea-Dweller leaves the factory without one~~.		The 1665 carries the valve in its first generation. The 16660 enlarges it for the 1220-metre depth rating. The 16600 and 116600 inherit the larger valve.

	== Historical anchors ==		== Historical anchors ==

Admin: Sea-Dweller family hub — initial publish (4 in-scope refs: 1665, 16660, 16600, 116600)

2026-05-16T03:28:48Z

Sea-Dweller family hub — initial publish (4 in-scope refs: 1665, 16660, 16600, 116600)

New page

{{#seo:
|title=Rolex Sea-Dweller — Complete Reference Guide — BezelBase
|description=Every pre-2020 Rolex Sea-Dweller reference, from the 1967 Single Red prototypes through the 2014–2017 116600 reissue. Production histories, dial mark generations, COMEX deliveries, movement specs, and collector context.
|keywords=Rolex Sea-Dweller, 1665, 16660, 16600, 116600, Single Red Sea-Dweller, Double Red Sea-Dweller, Great White, Triple Six, Sea-Dweller 4000, COMEX, helium escape valve, Patent Pending, Pisani dial, Khanjar
|type=article
}}

= Rolex Sea-Dweller =

The Sea-Dweller is the Rolex reference built for saturation diving — the Submariner with a helium escape valve. The line opens in 1967 with a small batch of Single Red prototypes hand-made in Geneva for the US Navy's SEALAB 3 programme and the Tektite I saturation experiment. Civilian retail begins in 1971 with the 1665 Double Red. The line runs through four canonical references over fifty years, with the 116600 closing the pre-2020 small-case era in 2017.

The operational distinction sits at 9 o'clock on the case. A one-way helium release valve, Swiss patent CH492246 (filed November 1967, granted June 1970), lets helium dissolved in the watch during long mixed-gas chamber dives escape during decompression without popping the crystal off the case. The Submariner has no valve. Saturation divers need one. The Sea-Dweller is what Rolex built to give it to them.

This index covers every pre-2020 Sea-Dweller reference. The current-production 126600 (2017 onward) and 126603 (2019 onward) sit outside scope.

== Vintage acrylic-crystal era ==

The 1665 is the only Sea-Dweller with an acrylic crystal. Caliber 1575 with date but no quickset. Helium escape valve introduced. The reference runs through three dial generations across sixteen years — Single Red, Double Red Mk I–IV, and Great White Mk 0–IV.

{| class="wikitable" style="width:100%;"
|-
! Reference !! Production !! Movement !! Crystal !! Depth !! Key distinction
|-
| [[Reference:1665|1665]] || 1967 prototypes; 1971 civilian; 1983 end || 1575 || Acrylic || 610m / 2000ft || First Sea-Dweller. Three dial generations: Single Red (12 surfaced), Double Red Mk I–IV (Patent Pending caseback Mk I in 1.7M and 2.1M batches), Great White Mk 0–IV. COMEX 300 units 1976–81 with issue numbers 2000–2300. Asprey Khanjar branch with Sultan Qaboos crest.
|}

== Triple Six — sapphire crystal, cal 3035 (1978–1988) ==

The 16660 is the first sapphire-crystal Sea-Dweller, the first with a unidirectional bezel, and the first with quickset date. Depth rating doubled to 1220m / 4000ft. Caliber 3035 replaces the cal 1575. Production overlaps the 1665 for five years (1978 to 1983).

{| class="wikitable" style="width:100%;"
|-
! Reference !! Production !! Movement !! Crystal !! Depth !! Key distinction
|-
| [[Reference:16660|16660]] || 1978–1988 || 3035 || Sapphire || 1220m / 4000ft || "Triple Six". Andrea Piccinini's 8-tier dial taxonomy (MK0 / MK1 / MK1 bis / MK2 Beyeler matte "Pallettoni" → MK3 Stern glossy spider dial → MK4 / MK4 bis Lemrich → MK5 Beyeler "Bicchierini"). Caseback typology external Mk1–4 + internal Mk1–3. COMEX ~200 units 1980–84 issue 3000–3199 in two batches. Tiffany-signed branch the rarest retailer-signed Sea-Dweller.
|}

== Long-run cal 3135 (1989–2008) ==

The 16600 carries the 16660 case forward and replaces the movement. Caliber 3135 with full balance bridge. White-gold-surround applied indices throughout. Production spans three lume eras — tritium MK1, Luminova MK2 (short window late 1998 to early 2000), Super-LumiNova MK3. The 16600 is the last Sea-Dweller with an aluminum bezel insert and the last to wear tritium.

{| class="wikitable" style="width:100%;"
|-
! Reference !! Production !! Movement !! Crystal !! Depth !! Key distinction
|-
| [[Reference:16600|16600]] || 1989–2008 || 3135 || Sapphire || 1220m / 4000ft || The long-run Sea-Dweller. 20 years of continuous production — longest of any SD reference. MK1 tritium → MK2 Luminova "SWISS" → MK3 Super-LumiNova "SWISS MADE" → MK4 short-FT. 93160 bracelet throughout (not 93150 — strip-on-sight). COMEX 16600 ~200 units in 1992 first batch (issue 32XX, straight caseback engraving) + 1997 second batch (issue 33XX, curved engraving — final Rolex–COMEX delivery). Theo Mavrostomos #3379 case U139'751 the most-documented SD example. Polipetto Polizia di Stato 78-unit 2008 commission.
|}

== Modern reissue — 116600 (2014–2017) ==

After the 116660 Deepsea moved the Sea-Dweller line to 44mm in 2008, the 116600 returns the reference to its canonical 40mm Oyster case. Three-year production. Caliber 3135 with Parachrom Blu hairspring (first Parachrom on a Sea-Dweller). Cerachrom ceramic bezel insert with platinum-coated graduations. Maxi dial with applied white-gold-surround indices and Chromalight lume. The "4000" depth designation drops from the dial despite the watch being marketed as "Sea-Dweller 4000".

{| class="wikitable" style="width:100%;"
|-
! Reference !! Production !! Movement !! Crystal !! Depth !! Key distinction
|-
| [[Reference:116600|116600]] || 2014–2017 || 3135 + Parachrom Blu || Sapphire || 1220m / 4000ft || Three-year reissue. First Cerachrom-bezel Sea-Dweller. Maxi dial, Chromalight lume, 97200 bracelet with Glidelock + Fliplock. Last 40mm Sea-Dweller before the 126600 took the line to 43mm. No mark generations — single dial, single bracelet, cleanest variant set in the SD line. Random scrambled serials throughout.
|}

== Helium escape valve — the line's defining feature ==

The HEV sits at 9 o'clock on every Sea-Dweller. Swiss patent CH492246, filed 6 November 1967, granted June 1970. The concept emerged from SEALAB diver Bob Barth's feedback on lost crystals during chamber decompression. Helium dissolves through case gaskets at saturation pressure; on ascent, the trapped gas expands and pops crystals off the case if it cannot escape. The valve is a one-way spring-loaded relief mechanism: internal pressure above the spring threshold opens it, the spring re-seats against water and dirt ingress on the way back down.

The 1665 carries the valve in its first generation. The 16660 enlarges it for the 1220-metre depth rating. The 16600 and 116600 inherit the larger valve. No Sea-Dweller leaves the factory without one.

== Historical anchors ==

* '''1967 — first Single Red prototypes delivered.''' Hand-made in Geneva for SEALAB 3 and Tektite I aquanauts. ~10 prototypes per T. Walker Lloyd (Rolex USA).
* '''15 February 1969 — Berry Cannon SEALAB 3 death.''' Wore a valved Single Red during the fatal DDC decompression.
* '''Late 1971 — first co-branded Rolex–COMEX delivery.''' Batch of ten in the 2.6M serial range, double-signed and numbered 1 through 10.
* '''17 February 1972 — formal Rolex–COMEX exclusivity letter.''' From Rolex Geneva to John M. Kelly, Singapore.
* '''24 May 1972 — Physalie 6 record.''' Robert Gauret and Patrice Chemin reach 2000 feet / 610 metres wearing DRSDs. 233-hour, 17-day decompression schedule.
* '''1992 — Theo Mavrostomos Hydra X dive.''' Reaches 701 metres over 43 days breathing Hydeliox. His 16600 caseback carries the inscription "Theo Mavrostomos – Hydrax – 701 M".

== Special branches ==

The four main Sea-Dweller references host institutional and retailer-signed branches whose provenance and authentication warrant separate treatment in the per-ref articles:

* '''Patent Pending caseback DRSD (1665 Mk I)''' — ~100 examples, hand-engraved caseback, 1.7M and 2.1M serial bands. Marcello Pisani's batch tables identify the canonical anti-fake checks (inside-back last-three-digits stamp present from 2.117M onward).
* '''COMEX 1665''' — 300 numbered units 1976–81, issue 2000–2300, serial 5.14M–6.76M, "600m" depth on the dial. Three dial sub-generations track the Great White Mk system.
* '''COMEX 16660''' — ~200 units 1980–84, issue 3000–3199, two batches matching the matte→glossy transition.
* '''COMEX 16600''' — ~200 units in two batches, 1992 (issue 32XX, straight caseback engraving) and 1997 (issue 33XX, curved engraving). Final Rolex–COMEX delivery.
* '''Asprey Khanjar 1665 (Oman, Sultan Qaboos)''' — Red Khanjar with Qaboos signature in 3,566,9xx batch (~80–90 examples), gold Khanjar in 5.0M batch (4–5 known). Battle of Mirbat (July 1972) context.
* '''Single Red Sea-Dweller''' — ~10 hand-made prototypes 1967–69. ~12 surfaced. SEALAB 3 (Cousteau #1602920), Tektite I (Koblick #1602915, Waller), Deepstar (Bradley #1602913), COMEX Physalie (Brauer #1820177).
* '''US Navy Experimental Diving Unit''' — Patent Pending batch 2 (2.128M) loaned to USN EDU. Charles E. Gross #2128225 in a 28-day saturation simulation to 1000ft, June-July 1970.
* '''Polipetto 16600 (Polizia di Stato Sommozzatori, 2008)''' — 78 units for the 50th anniversary of the Italian State Police Diving Corps. 28 personalised with diver patent number on the caseback. Octopus emblem on the dial.
* '''Tiffany & Co retailer-signed 16660''' — handful of surviving examples, barely surfaces on the public market.

== Reference guides ==

Cross-family material that applies across the Sea-Dweller line:

* '''[[Reference:Bracelets|Bracelets]]''' — the 9315, 93150, 93160, 78360, 97200 fitments and clasp date-code key
* '''[[Reference:Movements|Movements]]''' — caliber 1575 (1665), 3035 (16660), 3135 (16600 + 116600 with Parachrom Blu)
* '''[[Reference:Serial-numbers|Serial numbers]]''' — numeric 1967–1987, letter prefix 1987–2010, random alphanumeric 2010 onward

[[Category:Sea-Dweller]]
[[Category:Family]]

← Older revision		Revision as of 05:22, 16 May 2026
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	This index covers every pre-2020 Sea-Dweller reference. The current-production 126600 (2017 onward) and 126603 (2019 onward) sit outside scope.		This index covers every pre-2020 Sea-Dweller reference. The current-production 126600 (2017 onward) and 126603 (2019 onward) sit outside scope.

			[[File:Sea-dweller vintage poster.webp\|thumb\|center\|400px\|alt=Rolex Sea-Dweller 1979 magazine advertisement\|Rolex Sea-Dweller 1979 magazine campaign: "Why the Rolex Sea-Dweller never gets the bends"]]

	== Vintage acrylic-crystal era ==		== Vintage acrylic-crystal era ==
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	== Historical anchors ==		== Historical anchors ==

	* ~~'''~~1967 — first Single Red prototypes delivered.~~'''~~ Hand-made in Geneva for SEALAB 3 and Tektite I aquanauts. ~10 prototypes per T. Walker Lloyd (Rolex USA).		* 1967 — first Single Red prototypes delivered. Hand-made in Geneva for SEALAB 3 and Tektite I aquanauts. ~10 prototypes per T. Walker Lloyd (Rolex USA).
	* ~~'''~~15 February 1969 — Berry Cannon SEALAB 3 death.~~'''~~ Wore a valved Single Red during the fatal DDC decompression.		* 15 February 1969 — Berry Cannon SEALAB 3 death. Wore a valved Single Red during the fatal DDC decompression.
	* ~~'''~~Late 1971 — first co-branded Rolex–COMEX delivery.~~'''~~ Batch of ten in the 2.6M serial range, double-signed and numbered 1 through 10.		* Late 1971 — first co-branded Rolex–COMEX delivery. Batch of ten in the 2.6M serial range, double-signed and numbered 1 through 10.
	* ~~'''~~17 February 1972 — formal Rolex–COMEX exclusivity letter.~~'''~~ From Rolex Geneva to John M. Kelly, Singapore.		* 17 February 1972 — formal Rolex–COMEX exclusivity letter. From Rolex Geneva to John M. Kelly, Singapore.
	* ~~'''~~24 May 1972 — Physalie 6 record.~~'''~~ Robert Gauret and Patrice Chemin reach 2000 feet / 610 metres wearing DRSDs. 233-hour, 17-day decompression schedule.		* 24 May 1972 — Physalie 6 record. Robert Gauret and Patrice Chemin reach 2000 feet / 610 metres wearing DRSDs. 233-hour, 17-day decompression schedule.
	* ~~'''~~1992 — Theo Mavrostomos Hydra X dive.~~'''~~ Reaches 701 metres over 43 days breathing Hydeliox. His 16600 caseback carries the inscription "Theo Mavrostomos – Hydrax – 701 M".		* 1992 — Theo Mavrostomos Hydra X dive. Reaches 701 metres over 43 days breathing Hydeliox. His 16600 caseback carries the inscription "Theo Mavrostomos – Hydrax – 701 M".

	== Special branches ==		== Special branches ==
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	The four main Sea-Dweller references host institutional and retailer-signed branches whose provenance and authentication warrant separate treatment in the per-ref articles:		The four main Sea-Dweller references host institutional and retailer-signed branches whose provenance and authentication warrant separate treatment in the per-ref articles:

	* ~~'''~~Patent Pending caseback DRSD (1665 Mk I)~~'''~~ — ~100 examples, hand-engraved caseback, 1.7M and 2.1M serial bands. Marcello Pisani's batch tables identify the canonical anti-fake checks (inside-back last-three-digits stamp present from 2.117M onward).		* Patent Pending caseback DRSD (1665 Mk I) — ~100 examples, hand-engraved caseback, 1.7M and 2.1M serial bands. Marcello Pisani's batch tables identify the canonical anti-fake checks (inside-back last-three-digits stamp present from 2.117M onward).
	* ~~'''~~COMEX 1665~~'''~~ — 300 numbered units 1976–81, issue 2000–2300, serial 5.14M–6.76M, "600m" depth on the dial. Three dial sub-generations track the Great White Mk system.		* COMEX 1665 — 300 numbered units 1976–81, issue 2000–2300, serial 5.14M–6.76M, "600m" depth on the dial. Three dial sub-generations track the Great White Mk system.
	* ~~'''~~COMEX 16660~~'''~~ — ~200 units 1980–84, issue 3000–3199, two batches matching the matte→glossy transition.		* COMEX 16660 — ~200 units 1980–84, issue 3000–3199, two batches matching the matte→glossy transition.
	* ~~'''~~COMEX 16600~~'''~~ — ~200 units in two batches, 1992 (issue 32XX, straight caseback engraving) and 1997 (issue 33XX, curved engraving). Final Rolex–COMEX delivery.		* COMEX 16600 — ~200 units in two batches, 1992 (issue 32XX, straight caseback engraving) and 1997 (issue 33XX, curved engraving). Final Rolex–COMEX delivery.
	* ~~'''~~Asprey Khanjar 1665 (Oman, Sultan Qaboos)~~'''~~ — Red Khanjar with Qaboos signature in 3,566,9xx batch (~80–90 examples), gold Khanjar in 5.0M batch (4–5 known). Battle of Mirbat (July 1972) context.		* Asprey Khanjar 1665 (Oman, Sultan Qaboos) — Red Khanjar with Qaboos signature in 3,566,9xx batch (~80–90 examples), gold Khanjar in 5.0M batch (4–5 known). Battle of Mirbat (July 1972) context.
	* ~~'''~~Single Red Sea-Dweller~~'''~~ — ~10 hand-made prototypes 1967–69. ~12 surfaced. SEALAB 3 (Cousteau #1602920), Tektite I (Koblick #1602915, Waller), Deepstar (Bradley #1602913), COMEX Physalie (Brauer #1820177).		* Single Red Sea-Dweller — ~10 hand-made prototypes 1967–69. ~12 surfaced. SEALAB 3 (Cousteau #1602920), Tektite I (Koblick #1602915, Waller), Deepstar (Bradley #1602913), COMEX Physalie (Brauer #1820177).
	* ~~'''~~US Navy Experimental Diving Unit~~'''~~ — Patent Pending batch 2 (2.128M) loaned to USN EDU. Charles E. Gross #2128225 in a 28-day saturation simulation to 1000ft, June-July 1970.		* US Navy Experimental Diving Unit — Patent Pending batch 2 (2.128M) loaned to USN EDU. Charles E. Gross #2128225 in a 28-day saturation simulation to 1000ft, June-July 1970.
	* ~~'''~~Polipetto 16600 (Polizia di Stato Sommozzatori, 2008)~~'''~~ — 78 units for the 50th anniversary of the Italian State Police Diving Corps. 28 personalised with diver patent number on the caseback. Octopus emblem on the dial.		* Polipetto 16600 (Polizia di Stato Sommozzatori, 2008) — 78 units for the 50th anniversary of the Italian State Police Diving Corps. 28 personalised with diver patent number on the caseback. Octopus emblem on the dial.
	* ~~'''~~Tiffany & Co retailer-signed 16660~~'''~~ — handful of surviving examples, barely surfaces on the public market.		* Tiffany & Co retailer-signed 16660 — handful of surviving examples, barely surfaces on the public market.

	== Reference guides ==		== Reference guides ==
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	Cross-family material that applies across the Sea-Dweller line:		Cross-family material that applies across the Sea-Dweller line:

	* ~~'''~~[[Reference:Bracelets\|Bracelets]]~~'''~~ — the 9315, 93150, 93160, 78360, 97200 fitments and clasp date-code key		* [[Reference:Bracelets\|Bracelets]] — the 9315, 93150, 93160, 78360, 97200 fitments and clasp date-code key
	* ~~'''~~[[Reference:Movements\|Movements]]~~'''~~ — caliber 1575 (1665), 3035 (16660), 3135 (16600 + 116600 with Parachrom Blu)		* [[Reference:Movements\|Movements]] — caliber 1575 (1665), 3035 (16660), 3135 (16600 + 116600 with Parachrom Blu)
	* ~~'''~~[[Reference:Serial-numbers\|Serial numbers]]~~'''~~ — numeric 1967–1987, letter prefix 1987–2010, random alphanumeric 2010 onward		* [[Reference:Serial-numbers\|Serial numbers]] — numeric 1967–1987, letter prefix 1987–2010, random alphanumeric 2010 onward

	[[Category:Sea-Dweller]]		[[Category:Sea-Dweller]]
	[[Category:Family]]		[[Category:Family]]
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