The Cosmograph Daytona is equipped with calibre 4131. This new chronograph movement, entirely developed and manufactured by Rolex, is an evolution of calibre 4130. Unveiled in 2023, it incorporates a number of the major innovations that Rolex has brought to its movements, including the Chronergy escapement, Paraflex shock absorbers and an optimized ball bearing.
This calibre features a new aesthetic for the brand: a cut-out oscillating weight and, on the bridges, an exclusive Rolex Côtes de Genève decoration – a reinterpretation of an iconic finishing in traditional Swiss watchmaking.
On the version in 950 platinum, recognizable by its ice blue dial, the oscillating weight is made from 18 ct yellow gold and is visible to the wearer through the transparent case back in sapphire.