Reference
126503
Model case
Oyster, 40 mm, Oystersteel and yellow gold
Water-resistance
Waterproof to 100 metres / 330 feet
Bezel
Fixed, with engraved tachymetric scale, in yellow gold
Dial
Black, golden counter rings
Bracelet
Oyster, three-piece solid links
Movement
Perpetual, mechanical chronograph, self-winding
Calibre
4131, Manufacture Rolex
Power reserve
Approximately 72 hours
Certification
Superlative Chronometer (COSC + Rolex certification after casing)