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The 116523 is the Rolesor (steel-and-gold) Daytona of Rolex's first in-house chronograph generation. Steel case, 18k yellow gold bezel, steel-and-gold Oyster bracelet, caliber 4130 inside. It launched at Baselworld 2000 alongside the steel [[Reference:116520|116520]] and the full yellow gold 116528, ran for sixteen years, and gave way to the revised yellow-gold-bezel 116503 in 2016. It is the steel workhorse's dressier sibling, the same cal 4130 architecture in a finish aimed at a different buyer.
The 116523 is the steel-and-yellow-gold Rolesor Daytona in Rolex’s first in-house chronograph generation. It uses caliber 4130, a steel Oyster case, an 18k yellow-gold engraved bezel and a steel-and-gold Oyster bracelet. Introduced around 2000 alongside the 116520 and 116528, it was replaced by the 116503 generation in 2016.


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| bezel || engraved tachymetre, 18k yellow gold, fixed
| bezel || engraved tachymetre, 18k yellow gold, fixed
|-
|-
| crown || Triplock screw-down, gold-plated
| crown || Triplock screw-down, Rolesor/gold component as documented on the individual watch
|-
|-
| movement || caliber 4130, COSC, in-house
| movement || caliber 4130, COSC, in-house
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== Where it sits in the line ==
== Where it sits in the line ==


The 116523 succeeds the [[Reference:16523|16523]], the Zenith-era Rolesor Daytona that ran from 1988 to 2000. Case profile carries over almost unchanged: the same 40mm Oyster shell, the same screw-down pushers, the same engraved tachymetre bezel in 18k yellow gold. The change is internal. The Zenith-based cal 4030 left in 2000, and the fully in-house cal 4130 took its place.
The 116523 succeeds the [[Reference:16523|16523]], the Zenith-era Rolesor Daytona, and shares the 40mm Oyster case family, screw-down pushers and engraved gold bezel with the 116520 and 116528. The principal change from the 16523 is caliber 4130 replacing the Zenith-based 4030. The 116503 replaced it in 2016. Certification wording and testing standards changed across the generations, so the watch’s papers and period documentation should be checked.
 
It runs alongside the rest of the in-house first-generation family on the same cal 4130: the 116520 in steel, the 116528 in solid yellow gold, the 116519 in white gold, and the 116518 in yellow gold on a leather strap. The 116523 occupies the middle slot — gold for presence, steel for everyday wear, the Rolesor compromise that has been part of the Sport-model catalogue since the 1970s. The 116503 replaced it with a revised yellow-gold tachymetre bezel and an updated Rolesor execution. The 116523 is the last Rolesor Daytona of the COSC-only era: the 116503 kept the engraved gold bezel but moved to Rolex's Superlative Chronometer certification, tested to -2/+2 seconds a day after casing.


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


Production runs from 2000 to 2016: sixteen continuous years on a single reference number. The watch tracks the same revisions as the steel 116520 across that span. There is no distinct 116523 generation chronology, only the shared cal 4130 platform with Rolesor finishing.
The reference is generally dated from about 2000 to 2016. P-, V- and G-serial examples appear in the cited records, followed by later random serial formats, but serials date an individual watch only approximately. Lume descriptions vary by catalogue and period; published sources do not provide a definitive 116523 cutover table. The APH misprint is documented on parts of the 116520 record and is not established here as a 116523 variant.
 
Serials follow the catalogue-wide pattern, letter prefix through mid-2010 and random alphanumeric after that. Documented P-, V- and G-serial examples anchor the reference across the run.
 
The lume changes mid-life along with the rest of the cal 4130 family. Early 116523 production carries Luminova; Super-Luminova replaces it within the first few years; Chromalight arrives later in the run. The exact cutover years are debated and published sources do not converge on specific dates. Every 116523 sits on the post-tritium side of the 1998–2000 cutover that ended radioactive lume on Rolex Sport models.
 
The 116523 does not carry the APH error dial that marks a portion of the steel 116520 production. Phillips's Logan Baker frames the APH misprint as specific to 116520 black and white dial production starting around 2009 to 2010, and the 116523 does not appear in the variant's documented range.


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


Every 116523 runs caliber 4130, the same movement inside the steel 116520. The chronograph couples through a vertical clutch, where the coupling wheel engages from above instead of swinging in laterally, which removes the judder a lateral clutch shows on start; a column wheel handles the switching in place of a cam. The movement runs at 28,800 vph on 44 jewels with a 72-hour reserve, COSC certification and a Parachrom blue hairspring on later production. Hour and minute counters share a single side of the movement, and the mainspring can be replaced without uncasing the watch, a serviceability gain over the Zenith-based predecessor.
Every 116523 is described with caliber 4130 in the cited reference record. The movement uses a column wheel and vertical clutch, runs at 28,800 vph on 44 jewels and has an approximately 72-hour reserve. Hairspring and certification wording should be checked against the production period and service history. The 4130 moves the running seconds to six and the 12-hour counter to nine compared with the 4030-era layout.


The headline detail is shared across the generation: cal 4130 is Rolex's first wholly in-house chronograph. Thirty-seven years of bought-in chronograph bases — the Valjoux 72 family from 1963 onward, the Zenith El Primero base from 1988 — ended when the 4130 launched in 2000. The 116523 sits in the first model year of that transition. For the full caliber lineage and the 4030-to-4130 architecture comparison see [[Reference:Movements#cal-4130]].
The headline detail is shared across the generation: cal 4130 is Rolex's first wholly in-house chronograph. Thirty-seven years of bought-in chronograph bases — the Valjoux 72 family from 1963 onward, the Zenith El Primero base from 1988 — ended when the 4130 launched in 2000. The 116523 sits in the first model year of that transition. For the full caliber lineage and the 4030-to-4130 architecture comparison see [[Reference:Movements#cal-4130]].
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[[File:Ref 116523 dial-detail.webp|thumb|right|280px|alt=116523 grey-rhodium soleil dial|116523 grey-rhodium soleil dial]]
[[File:Ref 116523 dial-detail.webp|thumb|right|280px|alt=116523 grey-rhodium soleil dial|116523 grey-rhodium soleil dial]]


The 116523 dial catalogue runs broader than the steel 116520's. Rolesor invites colour and texture combinations the steel watch does not: yellow gold surrounds on the luminous markers, champagne sub-registers, mother-of-pearl, anthracite sunburst. Market frequency varies sharply from common to scarce, and several variants rest on a single auction lot.
The cited 116523 record includes black and white dials with gold surrounds, mother-of-pearl, champagne and anthracite or grey-rhodium examples. Some variants are supported by a single auction lot, so the table is a record of documented configurations rather than a complete factory catalogue.


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[[File:Ref 116523 caseback.webp|thumb|right|280px|alt=116523 caseback|116523 caseback]]
[[File:Ref 116523 caseback.webp|thumb|right|280px|alt=116523 caseback|116523 caseback]]


The 116523 case is steel, the same forging as the 116520, with an 18k yellow gold engraved tachymetre bezel screwed to it and a gold-plated Triplock crown. The bezel is the visible Rolesor mark on this reference: the steel 116520 carries the same bezel topography in steel, the 116523 in solid 18k yellow gold. Cerachrom did not arrive on the Daytona until the 2016 116500LN, so every 116523 wears the engraved gold bezel through its full run.
The case is the steel 40mm Oyster form used in the 4130 Daytona family, with an engraved 18k yellow-gold tachymeter bezel and a Rolesor crown component as documented on examples. Cerachrom arrived with the 2016 116500LN generation; the 116523 record is associated with the engraved gold bezel. Case measurements and replaced components should be recorded from the individual watch.
 
Case dimensions follow the 116520 closely. This is the same in-house-era Daytona case in a Rolesor finish.


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[[File:Ref 116523 clasp-and-bracelet.webp|thumb|right|280px|alt=116523 Rolesor Oyster bracelet and Oysterlock clasp|116523 Rolesor Oyster bracelet and Oysterlock clasp]]
[[File:Ref 116523 clasp-and-bracelet.webp|thumb|right|280px|alt=116523 Rolesor Oyster bracelet and Oysterlock clasp|116523 Rolesor Oyster bracelet and Oysterlock clasp]]


The bracelet reference is 78493, the steel-and-yellow-gold Oyster Rolesor SEL (solid end links) bracelet that ran the full 2000–2016 production span. The 78493 is the Rolesor sibling of the steel 116520's 78490: the same SEL Oyster construction, the same Easylink-equipped Oysterlock clasp, but with the centre links machined in 18k yellow gold rather than steel. End links are integral to the bracelet, not a separable stamped piece, which is why the 116523 sits flat against the lugs in a way the older 16523 with separable end-pieces does not.
The 78493 steel-and-yellow-gold Oyster bracelet is documented on 116523 examples. Easylink appears on later cal 4130 bracelets, while early examples may use an Oysterlock without the comfort extension; the exact transition should be checked on the clasp. Bracelet and clasp codes date those components, not automatically the watch head. The 78493 attribution should be confirmed against the bracelet and end links on the individual watch.
 
Listings sometimes reach for 78690 when labelling a Daytona bracelet, which is the Explorer code. The Rolesor Daytona bracelet is the 78493.
 
The clasp is the modern Oysterlock with Easylink 5mm comfort extension, a lever-and-keeper inside the clasp body that gives a five-millimetre micro-adjustment without tools. Easylink arrived on the cal 4130 generation around 2002 to 2003; the earliest 116523 production carried the Oysterlock without it. The clasp blade carries a year code — single letter through 2010, then a random three-character alphanumeric from 2011 — and on SEL bracelets the date code, part number, and Rolex crown are stamped into the underside of the end link itself rather than the clasp blade alone. See [[Reference:Bracelets]] for the full date-code key.


The Daytona never adopted the Glidelock micro-extension that came to the Submariner-line clasps in 2010. Easylink is the only on-bracelet adjustment the 116523 ever offered.
The Daytona never adopted the Glidelock micro-extension that came to the Submariner-line clasps in 2010. Easylink is the only on-bracelet adjustment the 116523 ever offered.
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The signature variant of this reference is a single watch, not a configuration. The 2011 Rolex 24 At Daytona — the season-opening endurance race at Daytona International Speedway, that year presented by Crown Royal Cask No. 16 — was won in GT class by The Racer's Group, whose #67 Porsche 997 GT3 Cup was shared by Andy Lally, Spencer Pumpelly, Brendan Gaughan, Wolf Henzler, and Steven Bertheau. The trophy watch awarded to the winning team was a Rolesor 116523, G-serial circa 2010, with a grey-rhodium soleil dial and a caseback engraved with the 2011 GT Champion mark. The watch later surfaced NOS with full box and papers, and that listing remains the canonical published documentation of the example.
The signature variant of this reference is a single watch, not a configuration. The 2011 Rolex 24 At Daytona — the season-opening endurance race at Daytona International Speedway, that year presented by Crown Royal Cask No. 16 — was won in GT class by The Racer's Group, whose #67 Porsche 997 GT3 Cup was shared by Andy Lally, Spencer Pumpelly, Brendan Gaughan, Wolf Henzler, and Steven Bertheau. The trophy watch awarded to the winning team was a Rolesor 116523, G-serial circa 2010, with a grey-rhodium soleil dial and a caseback engraved with the 2011 GT Champion mark. The watch later surfaced NOS with full box and papers, and that listing remains the canonical published documentation of the example.


The presentation watch does two things for the reference. It ties the 116523 to the race that gives the Daytona its name, which the steel 116520 cannot claim: by the in-house era the trophy watches were Rolesor and gold. It also puts a grey-rhodium soleil dial on record as a Rolex-issued specification rather than a non-original swap, a configuration the standard catalogue text does not enumerate. Whether other 116523 trophy presentations went out for GT-class wins in adjacent years is not documented.
The presentation watch documents a grey-rhodium soleil dial and a caseback engraving on one 116523. It is evidence for that watch and event; it does not establish a general trophy-watch programme or a standard dial branch.


The trophy context is broader than that single caseback. Rolex became title sponsor of the 24-hour Daytona race in 1992, and engraved Daytona watches became part of the victory ritual alongside the trophy. Later winner watches are reported on the two-tone 126503, though Rolex's own race coverage names no reference, so the 2011 116523 reads as an earlier Rolesor expression of the same race-prize pattern.
The trophy context is broader than that single caseback. Rolex became title sponsor of the 24-hour Daytona race in 1992, and engraved Daytona watches became part of the victory ritual alongside the trophy. Later winner watches are reported on the two-tone 126503, though Rolex's own race coverage names no reference, so the 2011 116523 reads as an earlier Rolesor expression of the same race-prize pattern.
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Sotheby's has catalogued the 116523 from launch examples through to late production. The GT Champion watch is what lifts the reference above routine auction coverage.
Sotheby's has catalogued the 116523 from launch examples through to late production. The GT Champion watch is what lifts the reference above routine auction coverage.


The Rolesor 116523 trades at a meaningful discount to its yellow gold sibling. Revolution's 2017 coverage of the Eric Clapton 116528 sale at Bishop &amp; Miller and Bonhams documented the yellow gold reference at a GBP 15,000 secondhand market floor at the time; the Rolesor 116523, carrying steel where the 116528 carries solid gold, has historically traded below that figure.
Auction and dealer prices vary with case condition, dial, bracelet, papers and venue. The cited sources do not establish a reference-wide discount, price trend or premium for one 116523 dial. The 116503 comparison is primarily a chronology and specification change.
 
The 2016 renumbering to the 116503 reset Rolesor Daytona pricing along the same line as the steel 116520 to 116500LN transition. The 116523 became the last COSC-only Rolesor Daytona, and used prices have climbed in the years that followed, particularly for full-set examples with the early Sotheby's-documented gold-trim configurations and for the rarer sunburst and Tahitian MOP dials.


== Related references ==
== Related references ==


* [[Reference:3525|Daytona 3525]] — "Monoblocco", WWII Chronograph (1939–1945)
* [[Reference:3525|Daytona 3525]] ("Monoblocco", WWII chronograph, 1939–1945)
* [[Reference:6234|Daytona 6234]] — Pre-Daytona (1955–1961)
* [[Reference:6234|Daytona 6234]] (Pre-Daytona, 1955–1961)
* [[Reference:6238|Daytona 6238]] — the 'Pre-Daytona' Chronograph
* [[Reference:6238|Daytona 6238]] (collector “Pre-Daytona” chronograph)
* [[Reference:6239|Daytona 6239]] — First Cosmograph, Paul Newman Dials
* [[Reference:6239|Daytona 6239]] (first Cosmograph; Paul Newman dials)
* [[Reference:6240|Daytona 6240]] — First Screw-Down-Pusher Daytona (1965–1969)
* [[Reference:6240|Daytona 6240]] (first screw-down-pusher Daytona, 1965–1969)
* [[Reference:6241|Daytona 6241]] — "John Player Special", 14k Gold (1966–1969)
* [[Reference:6241|Daytona 6241]] ("John Player Special", 14k gold, 1966–1969)


See also the [[Reference:daytona|Daytona family index]], [[Reference:Movements|movement reference]], [[Reference:Bracelets|bracelet & clasp guide]], and [[Reference:Serial-numbers|serial numbers by year]].
See also the [[Reference:daytona|Daytona family index]], [[Reference:Movements|movement reference]], [[Reference:Bracelets|bracelet & clasp guide]], and [[Reference:Serial-numbers|serial numbers by year]].
== Gallery ==
<gallery mode="packed" heights="180">
Ref 116523 hero.webp|Rolesor 116523 Daytona
Ref 116523 dial-detail.webp|Grey-rhodium dial example
Ref 116523 caseback.webp|Caseback and Rolesor case
Ref 116523 clasp-and-bracelet.webp|Rolesor bracelet and clasp
Ref 116523 gt-champion-caseback.webp|GT Champion presentation engraving
</gallery>


== Sources ==
== Sources ==
* [https://en.wikipedia.org/wiki/Rolex Wikipedia, "Rolex" — general company history]
* [https://monochrome-watches.com/history-rolex-daytona-chronograph-1963-in-depth-review/ In-Depth: The History of the Rolex Daytona, The Emblematic Racing Chronograph] — Erik Slaven, Monochrome
* [https://monochrome-watches.com/history-rolex-daytona-chronograph-1963-in-depth-review/ In-Depth: The History of the Rolex Daytona, The Emblematic Racing Chronograph] — Erik Slaven, Monochrome
* [https://www.sothebys.com/en/buy/auction/2019/the-rolex-daytona-capsule-collection/rolex-daytona-ref-116523-a-stainless-steel-and Rolex Daytona Capsule Collection 2019 — 116523 lots (Capsule Collection May 2019 + Watches Weekly Rolex/AP April 2020)] — Sotheby's
* [https://www.sothebys.com/en/buy/auction/2019/the-rolex-daytona-capsule-collection/rolex-daytona-ref-116523-a-stainless-steel-and Rolex Daytona Capsule Collection 2019 — 116523 lots (Capsule Collection May 2019 + Watches Weekly Rolex/AP April 2020)] — Sotheby's
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