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.
BRIGHT BLUE DIAL
WITH CHRONOGRAPH COUNTERS
This model features a bright blue dial with snailed counters, 18 ct gold applique hour markers and hands with a Chromalight display, a highly-legible luminescent material. The central sweep seconds hand allows an accurate reading of 1/8 second, while the two counters on the dial display the lapsed time in hours and minutes. Drivers can accurately map out their track times and tactics without fail.
Reference 116509
MODEL CASE
MODEL CASE Oyster, 40 mm, white goldOYSTER ARCHITECTURE Monobloc middle case, screw-down case back and winding crownDIAMETER 40 mmMATERIAL 18 ct white goldBEZEL Fixed, with engraved tachymetric scale, in 18 ct white goldWINDING CROWN Screw-down, Triplock triple waterproofness systemCRYSTAL Scratch-resistant sapphireWATER RESISTANCEWaterproof to 100 metres / 330 feet
MOVEMENT
MOVEMENT Perpetual, mechanical chronograph, self-windingCALIBRE 4130, Manufacture RolexPRECISION -2/+2 sec/day, after casingFUNCTIONS Centre hour, minute and seconds hands, small seconds hand at 6 o’clock. Chronograph (centre hand) accurate to within 1/8 of a second, 30-minute counter at 3 o’clock and 12-hour counter at 9 o’clock. Stop seconds for precise time settingOSCILLATOR Paramagnetic blue Parachrom hairspringWINDING Bidirectional self-winding via Perpetual rotorPOWER RESERVEApproximately 72 hours
BRACELET
BRACELET Oyster, flat three-piece linksBRACELET MATERIAL 18 ct white goldCLASPFolding Oysterlock safety clasp with Easylink 5 mm comfort extension link
DIAL
DIAL Bright blueDETAILSHighly legible Chromalight display with long-lasting blue luminescence
CERTIFICATION
CERTIFICATIONSuperlative Chronometer (COSC + Rolex certification after casing)
