Rolex Cosmograph Daytona 40 mm

Rolex Cosmograph Daytona 126519LN-0004 is a 40 mm chronograph in 18 ct white gold. The case measures 11.9 mm thick, with a lug width of 20 mm. A black monobloc Cerachrom bezel in ceramic carries a moulded tachymetric scale, and the sapphire crystal sits over a bright black and steel dial set with diamonds. Inside is the calibre 4131, a self-winding chronograph movement with a 72-hour power reserve, and Rolex certifies it as a Superlative Chronometer. Functions run to a small seconds subdial and chronograph counters, with luminous hands and indices for legibility. The watch is fitted on an Oysterflex bracelet, a metal-blade construction overmoulded in elastomer, closed by a folding Oysterlock safety clasp with the Glidelock extension system. The screw-down crown helps keep the case waterproof to 100 metres.