Reference:daytona-glossary - Revision history

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	<small>[[Reference:daytona\|Daytona]] → '''Glossary'''</small>		<small>[[Reference:daytona\|Daytona]] -> '''Glossary'''</small>

	= Daytona glossary =		= Daytona glossary =

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	'''Paul Newman dial.''' Singer-made Cosmograph dial with art-deco block markers, cross-hairs on the sub-dials, and 15/30/45 numerals on the 30-minute register. Fitted to six manual-wind references: [[Reference:6239\|6239]], [[Reference:6241\|6241]], [[Reference:6262\|6262]], [[Reference:6263\|6263]], [[Reference:6264\|6264]], and [[Reference:6265\|6265]]. Full treatment on [[Reference:paul-newman-daytona\|Paul Newman Daytona]].		'''Paul Newman dial.''' Singer-made Cosmograph dial with art-deco block markers, cross-hairs on the sub-dials, and 15/30/45 numerals on the 30-minute register. Fitted to six manual-wind references: [[Reference:6239\|6239]], [[Reference:6241\|6241]], [[Reference:6262\|6262]], [[Reference:6263\|6263]], [[Reference:6264\|6264]], and [[Reference:6265\|6265]]. Full treatment on [[Reference:paul-newman-daytona\|Paul Newman Daytona]].

	'''Mk1 through Mk4.''' Collector~~-consensus typology~~ for the Paul Newman dial~~, formalised by Stefano Mazzariol and carried into English-language editorial~~. Mk1 ~~(1963–1967) gilt-printed text,~~ no Daytona ~~signature.~~ Mk2 ~~(1966–1969) Daytona script added.~~ Mk3 ("Big Eyes", ~~1969–1972) larger sub-dial outer rings.~~ Mk4 ~~(1972–1988) narrower block markers; includes~~ the ~~Sigma sub~~-~~branch~~. See [[Reference:paul-newman-daytona#mark-1-through-mark-4-progression\|Mk progression table]].		'''Mk1 through Mk4.''' Collector shorthand for the four main Paul Newman dial generations. Mk1 has no Daytona line, Mk2 adds it, Mk3 is the Big Eyes generation, and Mk4 is the late narrow-marker run. See [[Reference:paul-newman-daytona#mark-1-through-mark-4-progression\|the full progression table]].

	'''Big Eyes.''' The Mk3 sub-mark of the Paul Newman dial, named for the visually larger sub-dial outer rings. 1969–1972 production.		'''Big Eyes.''' The Mk3 sub-mark of the Paul Newman dial, named for the visually larger sub-dial outer rings. 1969–1972 production.
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	'''MK7.''' U/A/P-serial (1998–2000). Super-LumiNova replaces tritium; SWISS MADE replaces T SWISS T.		'''MK7.''' U/A/P-serial (1998–2000). Super-LumiNova replaces tritium; SWISS MADE replaces T SWISS T.

	'''Patrizzi dial.''' ~~MK4 sub~~-~~branch~~ where the varnish over the silver sub-dial ~~outer~~ rings ~~reacts with light and air and~~ turns brown~~, ranging from light beige to deep chestnut~~. Named for Osvaldo Patrizzi~~, founder of Antiquorum~~. ~~Eligibility~~ window ~~1993–1995 per Revolution (Povey); 1993–1997 per Sotheby's Zenith guide (Orrico)~~. ~~Documented on [[Reference:16518\|16518]], [[Reference:16519\|16519]], [[Reference:16520\|16520]], [[Reference:16528\|16528]]. Period-correct degradation~~ is ~~asymmetric~~ across sub-dials; ~~evenly-painted "Patrizzi" reads as~~ a ~~refinish~~.		'''Patrizzi dial.''' Zenith-era dial where the varnish over the silver sub-dial rings turns brown. Named for Osvaldo Patrizzi. Most sources place the window in the mid-1990s. Real Patrizzi ageing is usually uneven across the three sub-dials; a perfectly even effect is a warning sign.

	'''Darth Vader.''' 16520 variant where the silver sub-dial chapter rings have faded to a near-black tone — the inverse of the Patrizzi browning. Documented by Sotheby's (Orrico 2025).		'''Darth Vader.''' 16520 variant where the silver sub-dial chapter rings have faded to a near-black tone — the inverse of the Patrizzi browning. Documented by Sotheby's (Orrico 2025).
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	'''Cal 727.''' Final manual-wind Daytona caliber. The 1969–1970 transition lifted the beat from 18,000 to 21,600 vph. Used in [[Reference:6262\|6262]], [[Reference:6263\|6263]], [[Reference:6264\|6264]], [[Reference:6265\|6265]] through 1988. See [[Reference:Movements#cal-727\|cal 727]].		'''Cal 727.''' Final manual-wind Daytona caliber. The 1969–1970 transition lifted the beat from 18,000 to 21,600 vph. Used in [[Reference:6262\|6262]], [[Reference:6263\|6263]], [[Reference:6264\|6264]], [[Reference:6265\|6265]] through 1988. See [[Reference:Movements#cal-727\|cal 727]].

	'''Cal 4030 (Zenith Daytona).''' ~~First automatic Daytona movement, a heavily modified~~ Zenith El Primero ~~400~~ base. 28,800 vph ~~(reduced from El Primero's 36,000)~~, 31 jewels, ~~COSC~~, free-sprung ~~Breguet~~ balance ~~with Rolex Micro-Stella regulating system~~, ~~no date function~~. ~~Power~~ reserve ~~52h per Revolution / 54h per Hodinkee (dispute preserved). Used 1988–2000 in the 16518 / 16519 / 16520 / 16523 / 16528~~. See [[Reference:Movements#cal-4030\|cal 4030]].		'''Cal 4030 (Zenith Daytona).''' Zenith El Primero base, heavily reworked by Rolex and used from 1988 to 2000. Core points: 28,800 vph, 31 jewels, no date, free-sprung balance, COSC. Published power reserve is usually 52 or 54 hours. See [[Reference:Movements#cal-4030\|cal 4030]].

	'''Cal 4130 (in-house chronograph).''' Rolex's first wholly in-house chronograph movement. Vertical-clutch coupling, column-wheel switching, 72-hour power reserve, 44 jewels, 28,800 vph, COSC. Used 2000–2016 in the 116520 / 116523 / 116528 (and continues in post-2019 ceramic-bezel successors). See [[Reference:Movements#cal-4130\|cal 4130]].		'''Cal 4130 (in-house chronograph).''' Rolex's first wholly in-house chronograph movement. Vertical-clutch coupling, column-wheel switching, 72-hour power reserve, 44 jewels, 28,800 vph, COSC. Used 2000–2016 in the 116520 / 116523 / 116528 (and continues in post-2019 ceramic-bezel successors). See [[Reference:Movements#cal-4130\|cal 4130]].

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	'''Cal 4030 (Zenith Daytona).''' First automatic Daytona movement, a heavily modified Zenith El Primero 400 base. 28,800 vph (reduced from El Primero's 36,000), 31 jewels, COSC, free-sprung Breguet balance with Rolex Micro-Stella regulating system, no date function. Power reserve 52h per Revolution / 54h per Hodinkee (dispute preserved). Used 1988–2000 in the 16518 / 16519 / 16520 / 16523 / 16528. See [[Reference:Movements#cal-4030\|cal 4030]].		'''Cal 4030 (Zenith Daytona).''' First automatic Daytona movement, a heavily modified Zenith El Primero 400 base. 28,800 vph (reduced from El Primero's 36,000), 31 jewels, COSC, free-sprung Breguet balance with Rolex Micro-Stella regulating system, no date function. Power reserve 52h per Revolution / 54h per Hodinkee (dispute preserved). Used 1988–2000 in the 16518 / 16519 / 16520 / 16523 / 16528. See [[Reference:Movements#cal-4030\|cal 4030]].

	'''Cal 4130 (in-house chronograph).''' Rolex's first wholly in-house chronograph movement. Vertical-clutch coupling, column-wheel switching, 72-hour power reserve, 44 jewels, 28,800 vph, COSC. Used 2000–2016 in the 116520 / 116523 / 116528 (and continues in post-2019 ceramic-bezel successors ~~out of scope here~~). See [[Reference:Movements#cal-4130\|cal 4130]].		'''Cal 4130 (in-house chronograph).''' Rolex's first wholly in-house chronograph movement. Vertical-clutch coupling, column-wheel switching, 72-hour power reserve, 44 jewels, 28,800 vph, COSC. Used 2000–2016 in the 116520 / 116523 / 116528 (and continues in post-2019 ceramic-bezel successors). See [[Reference:Movements#cal-4130\|cal 4130]].

	'''Zenith El Primero base.''' The 1969 Zenith El Primero 400 was the base movement Rolex used for the cal 4030. Rolex slowed it from 36,000 to 28,800 vph, replaced the escapement with a free-sprung Breguet balance, removed the date, and stamped it cal 4030. The Zenith branding never appeared on a Rolex-signed dial.		'''Zenith El Primero base.''' The 1969 Zenith El Primero 400 was the base movement Rolex used for the cal 4030. Rolex slowed it from 36,000 to 28,800 vph, replaced the escapement with a free-sprung Breguet balance, removed the date, and stamped it cal 4030. The Zenith branding never appeared on a Rolex-signed dial.

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	== Serial systems ==		== Serial systems ==

	'''Numeric serials (pre-1987).''' Sequential numbers, ~~approximately~~ one million serials per decade. Used through the manual-wind era. See [[Reference:Serial-numbers\|serial decoder]].		'''Numeric serials (pre-1987).''' Sequential numbers, about one million serials per decade. Used through the manual-wind era. See [[Reference:Serial-numbers\|serial decoder]].

	'''Letter serials (1987–2010).''' One letter prefix per production year. Covers the Zenith-era Daytona (R 1988 through P 2000) and the early in-house 116520 generation through 2010. See [[Reference:Serial-numbers\|serial decoder]].		'''Letter serials (1987–2010).''' One letter prefix per production year. Covers the Zenith-era Daytona (R 1988 through P 2000) and the early in-house 116520 generation through 2010. See [[Reference:Serial-numbers\|serial decoder]].
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	'''Phillips New York, 12 December 2020.''' Paul Newman's own Big Red 6263, engraved "Drive slowly Dad," sold for USD 5,475,000.		'''Phillips New York, 12 December 2020.''' Paul Newman's own Big Red 6263, engraved "Drive slowly Dad," sold for USD 5,475,000.

	'''Christie's Lesson One, Geneva, 10 November 2013.''' The first Paul Newman to breach seven figures at auction — an Oyster Sotto 6263 hammered at ~~approximately~~ USD 1.089M.		'''Christie's Lesson One, Geneva, 10 November 2013.''' The first Paul Newman to breach seven figures at auction — an Oyster Sotto 6263 hammered at about USD 1.089M.

	[[Category:Daytona]]		[[Category:Daytona]]
	[[Category:Glossary]]		[[Category:Glossary]]

Admin: Create Daytona glossary — consolidates ~40 variant/component terms across dial variants, movement, bracelet/clasp, case/bezel/crystal, serial systems, and auction landmarks

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Create Daytona glossary — consolidates ~40 variant/component terms across dial variants, movement, bracelet/clasp, case/bezel/crystal, serial systems, and auction landmarks

New page

{{#seo:
|title=Rolex Daytona Glossary — Dial Variants, Movement, Bracelet Terms — BezelBase
|description=Complete glossary for the Rolex Cosmograph Daytona: Paul Newman Mk1-4, RCO, JPS, Lemon, Big Red, Albino, Patrizzi, Neanderthal, Unicorn, Le Roi Soleil, GT Champion, and every named dial variant across the 1962-2016 manual-wind, Zenith, and in-house cal 4130 generations. Also movement, bracelet, clasp, case, and crystal terms.
|keywords=Rolex Daytona glossary, Paul Newman dial, RCO, Oyster Sotto, JPS, Lemon dial, Big Red, Patrizzi, Sigma, Albino, Neanderthal, Unicorn, Le Roi Soleil, cal 4030, cal 4130, cal 727, Valjoux 72, SEL, Oysterlock, Triplock
|image=Daytona vintage poster.webp
|type=article
}}

<small>[[Reference:daytona|Daytona]] → '''Glossary'''</small>

= Daytona glossary =

Terms that recur across the Rolex Cosmograph Daytona catalogue — dial variants, movement generations, bracelet and clasp references, case and bezel construction. Each entry links to the reference article where the term is documented in full context.

== Dial variants ==

=== Paul Newman and exotic dial family ===

'''Paul Newman dial.''' Singer-made Cosmograph dial with art-deco block markers, cross-hairs on the sub-dials, and 15/30/45 numerals on the 30-minute register. Fitted to six manual-wind references: [[Reference:6239|6239]], [[Reference:6241|6241]], [[Reference:6262|6262]], [[Reference:6263|6263]], [[Reference:6264|6264]], and [[Reference:6265|6265]]. Full treatment on [[Reference:paul-newman-daytona|Paul Newman Daytona]].

'''Mk1 through Mk4.''' Collector-consensus typology for the Paul Newman dial, formalised by Stefano Mazzariol and carried into English-language editorial. Mk1 (1963–1967) gilt-printed text, no Daytona signature. Mk2 (1966–1969) Daytona script added. Mk3 ("Big Eyes", 1969–1972) larger sub-dial outer rings. Mk4 (1972–1988) narrower block markers; includes the Sigma sub-branch. See [[Reference:paul-newman-daytona#mark-1-through-mark-4-progression|Mk progression table]].

'''Big Eyes.''' The Mk3 sub-mark of the Paul Newman dial, named for the visually larger sub-dial outer rings. 1969–1972 production.

'''RCO (Rolex Cosmograph Oyster).''' Rare Paul Newman dial where the 12 o'clock text reads "ROLEX COSMOGRAPH OYSTER" with OYSTER printed below Cosmograph rather than above. Documented only on [[Reference:6263|6263]] and [[Reference:6265|6265]]. Also called Oyster Sotto (Italian for "Oyster underneath"). The Oyster Sotto 6263 sold CHF 1,662,500 at Phillips Daytona Ultimatum 2018.

'''Oyster Sotto.''' Italian collector shorthand for the RCO dial layout. See RCO above.

'''JPS (John Player Special).''' Paul Newman dial on a yellow gold case where the dial is black and sub-dial surrounds and hour markers are gold-toned, echoing the John Player Special-sponsored Lotus F1 team livery of the 1970s. The 14k yellow gold [[Reference:6241|6241]] is the most populous JPS host (fewer than 400 produced, North American market).

'''Lemon dial.''' Yellow lacquer full-dial finish fitted to rare gold-case 6263 and 6265 examples. Per Revolution's 2017 Ridley bench dissection, gold-case Paul Newman Daytonas are always the Lemon variant, with rare RCO exceptions.

=== 6263 / 6265 specialty dials ===

'''Big Red Daytona.''' Standard 6263 dial with "DAYTONA" printed in red block letters above the 6 o'clock sub-register. Introduced ~1976, default 6263 dial by the early 1980s. Paul Newman's own 6263 — a Big Red — sold Phillips NY December 2020 for USD 5.48M. See [[Reference:6263|6263]].

'''Floating Big Red.''' Transitional variant where the DAYTONA text sits visibly further from the sub-dial than on standard Big Red. Rare and commands a meaningful premium.

'''Small Red.''' Late-1980s variant where the red DAYTONA is rendered in a noticeably smaller font than the Big Red. See [[Reference:6263|6263]] and [[Reference:6265|6265]].

'''Sigma dial.''' Dial with σσ symbols flanking SWISS at the 6 o'clock chapter, denoting gold-applied hour markers. Swiss-industry convention for identifying precious-metal components. Appears ~1972–1978 across both [[Reference:6263|6263]] and [[Reference:6265|6265]].

'''Albino 6263.''' White-on-white monochromatic dial — silver sub-dials on a white base, bearing only "Rolex Oyster Cosmograph" without the standard "Daytona" wording. Three known examples. Most disputed dial in the manual-wind Daytona literature — Hodinkee (Clymer 2013) as factory Rolex variant vs. Perezcope (2025) as 1990s Tom Bolt construction. See [[Reference:6263|6263]].

'''Tropical.''' Production-period black dial that oxidised to brown under UV exposure or heat. Not a separate factory variant — aged production dials valued for patina. Distinct from Patrizzi (which affects only sub-dial outer rings).

'''Double Swiss Underline.''' Earliest [[Reference:6239|6239]] production with a line under "SWISS" at the dial base and a second "SWISS" printed just above — radium-era markings transitioning out.

=== 6238 / 6240 specialty dials ===

'''Neanderthal 6240.''' Disputed dial configuration presented at Phillips Daytona Ultimatum 2018 as the earliest Paul Newman prototype. Perezcope's 2022 forensic dossier argues the dial is a late-1990s construction from a 6238 donor, using contemporaneous evidence from the April 1998 ''Orologi & Market''. Both positions on record. See [[Reference:6240|6240]].

=== 6265 specialty dials ===

'''Unicorn 6265.''' The only known white gold 6265 (case 2877587, manufactured 1970). Sold CHF 5,937,500 at Phillips Daytona Ultimatum 2018 — second-most-expensive Rolex at auction at that point. Perezcope's 2022 Frankenstein analysis disputes authenticity using 2010 IG photographs and millerighe pusher forensics. Both positions on record. See [[Reference:6265|6265]].

=== Middle Eastern commissions ===

'''Sultan of Oman Khanjar.''' 6263 / 6265 examples carrying the Omani red Khanjar (curved dagger) emblem above the 6 o'clock sub-dial. Made in small numbers for Sultan Qaboos mid-1970s. Some examples carry Asprey signature. A Khanjar 6263 with Asprey signature sold USD 864,521 at Christie's Lesson One, Geneva, November 2013.

'''UAE Quraysh Hawk.''' 6263 example carrying the UAE military emblem (Hawk of Quraish with Arabic script reading "UAE armed forces") at 6 o'clock. Made for Sheikh Mohammed bin Rashid Al Maktoum during his UAE defence ministry tenure. Phillips Daytona Ultimatum 2018 Lot 13, estimate CHF 200,000–400,000.

'''Arabian Knight 6263.''' Eastern Arabic numeral hour markers; white gold quarter-hour markers; Sigma logos at 6 referencing the white gold indices. Phillips Daytona Ultimatum 2018 Lot 21, estimate CHF 1.5M–3.0M. Featured once in print before 2018; no comparable auction precedent.

=== Zenith era (cal 4030) dial progression ===

'''MK1 Floating Cosmograph Porcelain.''' First-year R-serial (1988) [[Reference:16520|16520]]-generation dial. Extra space between COSMOGRAPH and the next four lines; inverted 6 in hour totaliser at 9 o'clock; porcelain / glossy finish. Most consistently appreciating 16520 variant since 2015.

'''MK2 Floating 4-Liner.''' L-serial (1989–1990) dial. OFFICIALLY CERTIFIED line missing — dial reads four lines of text instead of five. Documented paired with the early 50-200 "UNITS PER HOUR" bezel in the Cattin Collection photography.

'''MK3 Inverted 6.''' E/N/X/C-serial (1990–1992). Inverted 6 in the 9 o'clock sub-dial; OFFICIALLY CERTIFIED restored.

'''MK4 Corrected 6.''' S/T-serial (1993–1996). Corrected 6 orientation; T SWISS T tritium markings; Patrizzi sub-dial varnish reaction eligibility window starts here.

'''MK5, MK6.''' Late-tritium T/U-serial (1996–1998). Mazzariol's original five-mark typology collapses MK5 and MK6; the seven-mark expansion is working scaffold rather than settled consensus.

'''MK7.''' U/A/P-serial (1998–2000). Super-LumiNova replaces tritium; SWISS MADE replaces T SWISS T.

'''Patrizzi dial.''' MK4 sub-branch where the varnish over the silver sub-dial outer rings reacts with light and air and turns brown, ranging from light beige to deep chestnut. Named for Osvaldo Patrizzi, founder of Antiquorum. Eligibility window 1993–1995 per Revolution (Povey); 1993–1997 per Sotheby's Zenith guide (Orrico). Documented on [[Reference:16518|16518]], [[Reference:16519|16519]], [[Reference:16520|16520]], [[Reference:16528|16528]]. Period-correct degradation is asymmetric across sub-dials; evenly-painted "Patrizzi" reads as a refinish.

'''Darth Vader.''' 16520 variant where the silver sub-dial chapter rings have faded to a near-black tone — the inverse of the Patrizzi browning. Documented by Sotheby's (Orrico 2025).

'''Le Roi Soleil 16518.''' The only known Van Cleef & Arpels-signed 16518 — locally-printed VCA logo with paint-drip authentication detail, VCA letter-of-provenance with 1995 sale date. Phillips Daytona Ultimatum 2018 Lot 18, estimate CHF 50,000–100,000. See [[Reference:16518|16518]].

'''Beach dial family.''' Pastel mother-of-pearl layouts on [[Reference:16518|16518]] and [[Reference:16519|16519]] — pink, salmon, pale blue MOP base with painted Roman or applied indices. Chrysoprase, lapis lazuli, sodalite stone variants sit in this family. Rolex did not issue them in a single canonical layout.

=== In-house cal 4130 era dials ===

'''APH error dial.''' 116520 variant with visible kerning gap between "Cosmogr" and "aph" in the dial text — misprint produced by an Asia-Pacific Hong Kong dial batch 2009 onward. Documented by Phillips's Logan Baker. Carries a small market premium today despite being a misprint. See [[Reference:116520|116520]].

'''2011 GT Champion 116523.''' Grey-rhodium soleil dial on a G-serial (circa 2010) 116523 presented to TRG / Nadeau Motorsports for their GT-class win at the 2011 Rolex 24 At Daytona. Crown Royal Cask No. 16. Caseback engraved with the 2011 GT Champion mark. See [[Reference:116523|116523]].

'''Mexican red dial.''' Late-production 116528 sub-branch — black lacquer dial with red DAYTONA script more prominent than the standard configuration. See [[Reference:116528|116528]].

=== Stone and gem-set dial types ===

'''Sodalite.''' Deep-blue mineral dial with applied gold markers. Documented across gold-case references: [[Reference:16518|16518]], [[Reference:16519|16519]], [[Reference:16528|16528]], [[Reference:116520|116520]], [[Reference:116523|116523]], [[Reference:116528|116528]].

'''Lapis lazuli.''' Deeper blue-black flecked stone dial with applied markers. [[Reference:16518|16518]] and [[Reference:16528|16528]].

'''Mother-of-pearl (MOP).''' White or Tahitian (dark) MOP base with sub-dials cut from the same material on most examples. Appears across gold and in-house gen-1 references.

'''Diamond markers.''' Applied diamond hour markers in place of gold five-minute markers. Factory configurations documented by Sotheby's across the gold cal 4030 and cal 4130 generations.

'''Sapphire markers.''' Blue sapphire hour markers. Less common than diamond configurations.

'''Pavé.''' Factory-set diamond pavé across the dial surface, with or without coloured-stone accents (ruby, sapphire). Distinguishing factory from aftermarket pavé requires case-by-case authentication.

== Movement ==

'''Valjoux 72.''' Manual-wind chronograph base movement used in the Daytona from [[Reference:6238|6238]] in 1962 through the [[Reference:6263|6263]] / [[Reference:6265|6265]] in 1988. Rolex modifications produced calibres 722, 722-1, and 727 across the generation.

'''Cal 722.''' Early Rolex designation on the Valjoux 72 base, 18,000 vph. Used in the [[Reference:6238|6238]] and early [[Reference:6239|6239]] production.

'''Cal 722-1.''' Intermediate Valjoux 72 generation, late 1960s. Used in [[Reference:6239|6239]], [[Reference:6240|6240]], [[Reference:6241|6241]].

'''Cal 727.''' Final manual-wind Daytona caliber. The 1969–1970 transition lifted the beat from 18,000 to 21,600 vph. Used in [[Reference:6262|6262]], [[Reference:6263|6263]], [[Reference:6264|6264]], [[Reference:6265|6265]] through 1988. See [[Reference:Movements#cal-727|cal 727]].

'''Cal 4030 (Zenith Daytona).''' First automatic Daytona movement, a heavily modified Zenith El Primero 400 base. 28,800 vph (reduced from El Primero's 36,000), 31 jewels, COSC, free-sprung Breguet balance with Rolex Micro-Stella regulating system, no date function. Power reserve 52h per Revolution / 54h per Hodinkee (dispute preserved). Used 1988–2000 in the 16518 / 16519 / 16520 / 16523 / 16528. See [[Reference:Movements#cal-4030|cal 4030]].

'''Cal 4130 (in-house chronograph).''' Rolex's first wholly in-house chronograph movement. Vertical-clutch coupling, column-wheel switching, 72-hour power reserve, 44 jewels, 28,800 vph, COSC. Used 2000–2016 in the 116520 / 116523 / 116528 (and continues in post-2019 ceramic-bezel successors out of scope here). See [[Reference:Movements#cal-4130|cal 4130]].

'''Zenith El Primero base.''' The 1969 Zenith El Primero 400 was the base movement Rolex used for the cal 4030. Rolex slowed it from 36,000 to 28,800 vph, replaced the escapement with a free-sprung Breguet balance, removed the date, and stamped it cal 4030. The Zenith branding never appeared on a Rolex-signed dial.

== Bracelet and clasp ==

'''Oyster bracelet.''' Three-link flat construction used across every Daytona generation in various references: 7205 / 7836 / 78350 (manual-wind era), 78360 / 78390 (Zenith era), 78490 (in-house gen 1). See [[Reference:Bracelets|Bracelets]].

'''SEL (Solid End Link).''' Bracelet construction where the end-link is integral to the first link rather than a separate stamped piece. Introduced on the 16520 at the U-serial (1997–1998) transition and carried forward on every in-house-era Daytona reference.

'''78360.''' Heavy-link Oyster bracelet, 1976–1993. Used on the early Zenith [[Reference:16520|16520]] (R-serial through early S-serial 1988–1993).

'''78390.''' Zenith-era Oyster successor to the 78360, 1993–2000. Used on the 16520 from S-serial 1993 through end of production.

'''78490.''' In-house era SEL Oyster bracelet. Used on the [[Reference:116520|116520]] 2000–2016. The 78690 reading appears in some aggregator listings — that number is documented elsewhere as the Explorer 14270 bracelet. The 78490 identification is the multi-source consensus for the 116520.

'''Oysterlock.''' Rolex's safety clasp with a folding cover over a folding clasp. Multiple generations across the Daytona run.

'''Easylink.''' 5mm comfort extension inside the Oysterlock clasp — a lever-and-keeper that gives a micro-adjustment without tools. Arrived on the [[Reference:116520|116520]] around 2002–2003.

'''Glidelock.''' Micro-extension mechanism introduced on Submariner-line clasps in 2010. ''The Daytona never adopted Glidelock.'' Easylink is the only on-bracelet adjustment the 116520 generation offered.

'''Clasp date code.''' Single-letter code stamped inside the clasp blade. Runs A=1976 through CP=2011 with a 1995–98 overlap window (T/W/U/V/Z). Randomised from 2011 onward. S-prefix marks a service-replacement clasp, not a production year. See [[Reference:Bracelets|Bracelets]] for the full key.

== Case, bezel, crystal, crown ==

'''Oyster case.''' Rolex's water-resistant case construction with screw-down caseback, screw-down crown, and screw-down pushers on chronograph variants. Introduced on the Daytona with the [[Reference:6240|6240]] in 1965.

'''Triplock.''' Screw-down crown sealing on three rubber gaskets. Rated to 100m / 330ft on the 16520-generation and 116520-generation Daytona.

'''Twinlock.''' Earlier screw-down crown sealing on two rubber gaskets. Used on manual-wind Daytona (6239 onward) before the Triplock arrived with the Zenith generation.

'''Screw-down pushers.''' Chronograph pushers that lock to prevent accidental actuation underwater. Introduced on the [[Reference:6240|6240]] (1965) and the defining feature of the screw-pusher Oyster Daytona: [[Reference:6240|6240]], [[Reference:6263|6263]], [[Reference:6265|6265]], and every subsequent Daytona reference.

'''Pump pushers.''' Non-screw-down chronograph pushers. Used on the earlier [[Reference:6239|6239]], [[Reference:6241|6241]], [[Reference:6262|6262]], and [[Reference:6264|6264]].

'''Engraved metal tachymetre bezel.''' Tachymetre scale engraved directly into the bezel metal (steel or precious metal). Defines the [[Reference:6239|6239]], [[Reference:6262|6262]], [[Reference:6264|6264]], [[Reference:6265|6265]], and the Zenith and in-house gen-1 steel references.

'''Acrylic bezel insert.''' Aluminium insert with the tachymetre printed on acrylic, fitted into the bezel. Defines the [[Reference:6240|6240]], [[Reference:6241|6241]], and [[Reference:6263|6263]].

'''Cerachrom.''' Ceramic bezel introduced with the 116500LN in 2016. ''Out of scope for BezelBase (post-2020 production).'' Every reference in the Daytona line through the 116520 generation uses steel or gold engraved tachymetre bezels, not ceramic.

'''Acrylic crystal.''' Plexiglass crystal used on every manual-wind Daytona (6238 through 6265). Replaced by sapphire at the 16520 generation (1988).

'''Sapphire crystal.''' Flat sapphire crystal with no Cyclops. Used on every Zenith-era and in-house gen-1 Daytona from 1988 onward.

== Serial systems ==

'''Numeric serials (pre-1987).''' Sequential numbers, approximately one million serials per decade. Used through the manual-wind era. See [[Reference:Serial-numbers|serial decoder]].

'''Letter serials (1987–2010).''' One letter prefix per production year. Covers the Zenith-era Daytona (R 1988 through P 2000) and the early in-house 116520 generation through 2010. See [[Reference:Serial-numbers|serial decoder]].

'''Random alphanumeric (2010+).''' Rolex randomised serials in 2010 to combat counterfeit decoding. Post-2010 116520 / 116523 / 116528 production carries random eight-character alphanumeric strings with no public year mapping.

== Auction landmarks ==

'''Phillips Daytona Ultimatum, Geneva, 12 May 2018.''' 32-watch thematic sale curated by Pucci Papaleo with Aurel Bacs at the rostrum. Reset the market ceiling across the manual-wind Daytona category. Highlights: the Unicorn 6265 (CHF 5,937,500), the Neanderthal 6240 (CHF 3,012,500), the Oyster Sotto 6263 (CHF 1,662,500).

'''Phillips Winning Icons, New York, 26 October 2017.''' Paul Newman's own 6239 MK1 sold for USD 17,752,500 — the highest price paid for any Rolex at public auction. See [[Reference:paul-newman-daytona|Paul Newman Daytona]].

'''Phillips New York, 12 December 2020.''' Paul Newman's own Big Red 6263, engraved "Drive slowly Dad," sold for USD 5,475,000.

'''Christie's Lesson One, Geneva, 10 November 2013.''' The first Paul Newman to breach seven figures at auction — an Oyster Sotto 6263 hammered at approximately USD 1.089M.

[[Category:Daytona]]
[[Category:Glossary]]