The Cosmograph Daytona 126500LN in white dial trim contrasts crisp registers against a black Cerachrom tachymeter bezel on a 40 mm Oystersteel case; inside beats the calibre 4131, Rolex’s latest automatic, column‑wheel, vertical‑clutch chronograph with Chronergy escapement, blue Parachrom hairspring, and a 72‑hour reserve—delivering the razor‑sharp timing and everyday robustness that define the modern Daytona.