The triumph of endurance
The Oyster Perpetual Cosmograph Daytona in Oystersteel and yellow gold with a black dial and contrasting counter rings. It features an Oyster bracelet and a yellow gold bezel with an engraved tachymetric scale.
The tachymetric scale
High-performance chronograph
With its tachymetric scale, its three counters and its pushers, the Cosmograph Daytona was designed to be the ultimate timing tool for endurance racing drivers. The bezel features a tachymetric scale to read average speed over a given distance based on elapsed time.
This scale offers optimal legibility, making the Cosmograph Daytona the ideal instrument for measuring speeds up to 400 units per hour, expressed in kilometres or miles.
Black dial
With chronograph counters
This model features a black dial with spray-coated counters, 18 kt gold applique hour markers and hands with a Chromalight display, a highly-legible luminescent material.
The dial allows drivers to accurately map out their track times and tactics without fail.
Yellow Rolesor
A meeting of two metals
Gold is coveted for its lustre and nobility. Steel reinforces strength and reliability. Together, they harmoniously combine the best of their properties.
A true Rolex signature, Rolesor has featured on Rolex models since the early 1930s, and was trademarked as a name in 1933. It is one of the prominent pillars of the Oyster collection.
The Oyster bracelet
Alchemy of form and function
The design, development and production of Rolex bracelets and clasps, as well as the stringent tests they face, involve advanced high technology. And, as with all the components of the watch, aesthetic controls by the human eye guarantee impeccable beauty.
The Oyster bracelet is a perfect alchemy of form and function. First introduced in the late 1930s, this particularly robust and comfortable metal bracelet with its broad, flat three-piece links remains the most universal bracelet in the Oyster collection.
More Cosmograph Daytonatechnical details
Reference 126503
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Model case
Oyster, 40 mm, Oystersteel and yellow gold
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Oyster architecture
Monobloc middle case, screw-down case back and winding crown
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Diameter
40 mm
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Material
Yellow Rolesor - combination of Oystersteel and yellow gold
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Bezel
Fixed, with engraved tachymetric scale, in yellow gold
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Winding crown
Screw-down, Triplock triple waterproofness system
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Crystal
Scratch-resistant sapphire
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Water resistance
Waterproof to 100 metres / 330 feet
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Movement
Perpetual, mechanical chronograph, self-winding
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Calibre
4131, manufacture Rolex
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Precision
-2/+2 sec/day, after casing
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Functions
Centre hour and minute hands, small seconds hand at 6 o'clock. Chronograph via centre seconds hand, 30-minute counter at 3 o'clock and 12-hour counter at 9 o'clock. Stop seconds for exact time setting
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Oscillator
Paramagnetic blue Parachrom hairspring. High-performance Paraflex shock absorbers
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Winding
Bidirectional self-winding via Perpetual rotor
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Power reserve
Approximately 72 hours
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Bracelet
Oyster, three-piece solid links
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Material
Yellow Rolesor - combination of Oystersteel and yellow gold
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Clasp
Folding Oysterlock safety clasp with Easylink 5 mm comfort extension link
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Dial
Black, golden counter rings
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Details
Highly legible Chromalight display with long-lasting blue luminescence
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Certification
Superlative Chronometer (COSC + Rolex certification after casing)
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