Rolex · Family: Daytona
The Rolex Cosmograph Daytona 126503 is the Rolesor execution — a combination of Oystersteel and 18ct yellow gold — of Rolex's benchmark chronograph, with a 40mm case, a yellow gold bezel with an engraved tachymetric scale, and a black dial with gold-ringed counters. It runs the in-house Caliber 4131, with roughly 72 hours of power reserve, the movement Rolex introduced in the Daytona family's full 2023 overhaul. Cazador has no verified price observations yet for this reference. Its differential: it's the fifth Daytona reference Cazador's catalog carries, and the first two-tone (yellow Rolesor) execution.
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Insufficient data: 0 price observations recorded as of today. Cazador does not estimate or infer a range without our own verified market data.
The Cosmograph Daytona was born in 1963 as a tool watch for racing drivers, taking its name from Daytona Beach, Florida, home of the 24 Hours of Daytona, a race Rolex has sponsored since 1962. The Rolesor execution — Rolex's term for its Oystersteel-and-18ct-gold combinations — has accompanied the Daytona family for decades as a middle ground between full steel and solid gold.
In 2023, Rolex overhauled the Daytona family: a new in-house Caliber 4131 replaced the 4130 (in production since 1988 and progressively refined through 2023), alongside a redesigned case with a slightly different lug profile and a reworked tachymetric bezel. Reference 126503 belongs to that generation, with a 40mm case in Oystersteel and 18ct yellow gold.
The bezel, in solid yellow gold with the tachymetric scale engraved directly into the metal — unlike the Cerachrom ceramic bezels Rolex reserves for other executions in the family — pairs with a black dial whose three chronograph counters are ringed in gold, a color contrast that has been a constant across the Daytona's Rolesor and gold executions for generations.
Caliber 4131 improves precision and time-setting mechanics over its predecessor, while keeping roughly 72 hours of power reserve and the Superlative Chronometer certification Rolex applies after the movement is cased, on top of COSC standards.
This is the fifth Daytona reference Cazador adds, after the Oystersteel, platinum, and solid yellow-gold versions already in the catalog, and the first in the two-tone Rolesor combination.
Cazador has no verified price observations for this reference (n=0 as of today). We do not publish estimates without our own sourced market data.
It's Rolex's term for cases and bracelets that combine Oystersteel with 18ct gold. On the 126503, it's yellow Rolesor, with a matching yellow gold bezel.
Rolex replaced Caliber 4130 (in production since 1988) with the new in-house Caliber 4131, improving precision and time-setting mechanics while keeping roughly 72 hours of power reserve.
The 126503 combines Oystersteel with 18ct yellow gold on case, bezel, and bracelet (Rolesor), while the full-Oystersteel version (126500LN) uses a Cerachrom ceramic bezel instead of engraved gold.
Roughly 72 hours, in line with the previous Caliber 4130, but with refined time-setting mechanics and precision.
It has 100 meters of water resistance, enough for swimming and everyday wear, but the Daytona is a motorsport chronograph, not a technical dive watch like the Submariner or Sea-Dweller.
It's Rolex's own quality control, applied after the movement is cased, requiring precision beyond the COSC standard for Swiss watchmaking.