Blancpain Fifty Fathoms Automatique

Blancpain's Fifty Fathoms Automatique 5010 36B40 O64B is a dive watch with a 42.3 mm red gold case. The case measures 14.3 mm thick, and the lugs take a 21.5 mm strap. A sapphire crystal covers the sunburst blue dial, which sits beneath a unidirectional rotating bezel. The self-winding calibre 1315 drives the watch, with date and central seconds among its functions, and stores up to 120 hours of power reserve. That is a five-day reserve, unusually long for an automatic movement. The rubber strap closes with a folding clasp. Blancpain rates the case to 300 metres.