A sapphire case back An exciting reveal
By offering a watch that reveals its movement through a transparent case back, Rolex continues to innovate whilst echoing its watchmaking tradition. The calibre bears an openwork gold oscillating weight with three arms, engraved with the words “Chronometer Perpetual” and benefiting from an optimized ball bearing. The calibre 7140 boasts some remarkable finishes and the exclusive Côtes de Genève Rolex decoration – a celebrated traditional watch decoration, reinterpreted with a polished groove between each ridge. The virtually scratchproof sapphire window provides proof that, for Rolex, the aesthetics of the movement are as important as its performance. It inextricably links the watchmaking beauty of the calibre with the sleek design of its exterior.