Rolex Cosmograph Daytona Oyster, 40 mm, white gold and diamondsReference 126539TBR

This Oyster Perpetual
Cosmograph Daytona in
18 kt white gold, with a
steel, diamond-set dial
and contrasting counter
rings, features an
Oysterflex bracelet as
well as a diamond-set
bezel and diamond-set
lugs.
The Oysterflex Bracelet
Highly resistant and
durable
The 18 kt gold versions of the Cosmograph
Daytona with a Cerachrom bezel are available with
an Oysterflex bracelet. Developed by Rolex and
patented, it singularly combines the robustness of
a metal bracelet with the comfort of an elastomer
bracelet.
It is made up of two flexible curved metal blades –
one in each bracelet section – overmoulded with
high-performance black elastomer. For optimum
comfort, the Oysterflex bracelet is equipped with
cushions on its inner sides and an Oysterlock
safety clasp to prevent accidental opening. Its
length may be adjusted via the ingenious Rolex
Glidelock extension system.
18 kt white gold
Commitment to
excellence
By operating its own exclusive foundry, Rolex has
the unrivalled ability to cast the highest quality 18
kt gold alloys. According to the proportion
of silver, copper, platinum or palladium added,
different types of 18 kt gold are obtained: yellow,
pink or white.
They are made with only the purest metals and
meticulously inspected in an in-house laboratory
with state-of-the-art equipment, before the gold is
formed and shaped with the same painstaking
attention to quality. Rolex’s commitment to
excellence begins at the source.
Steel dial
With chronograph
counters
This model features a steel, diamond-set dial with
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.
Diamond-set bezel
Adorning a legendary
chronograph
The timepiece incorporates a bezel adorned with
36 trapeze-cut diamonds.
This now legendary chronograph is the instrument
of choice for measuring time intervals and
determining average speeds. On this gem-set
version, the emblematic tachymetric scale is
replaced with diamonds.
More technical details
Cosmograph Daytona
Reference 126539TBR
Model Case
Type
Oyster, 40 mm, white gold and
diamonds
Diameter
40 mm
Material
White gold
Bezel
Set with diamonds
Oyster Architecture
Monobloc middle case, screw-down
case back and winding crown
Winding Crown
Screw-down, Triplock triple
waterproofness system
Crystal
Scratch-resistant sapphire
Water Resistance
Waterproof to 100 metres / 330
feet
Movement
Type
Perpetual, mechanical chronograph,
self-winding
Calibre
4131, manufacture Rolex
Precision
-2/+2 sec/day, after casing
Oscillator
Paramagnetic blue Parachrom
hairspring. High-performance
Paraflex shock absorbers
Winding
Bidirectional self-winding via
Perpetual rotor
Power reserve
Approximately 72 hours
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