Blancpain Fifty Fathoms Automatique

Blancpain's Fifty Fathoms Automatique, reference 5010 3640 O64B, comes in a 42.3 mm red gold case. The case measures 14.3 mm thick, with lugs set 21.5 mm apart, giving the watch a solid, substantial presence on the wrist. A sapphire crystal covers the sunburst blue dial, which shows the date alongside a central seconds hand. Inside, the self-winding calibre 1315 runs with a power reserve of 120 hours, so the watch can sit unworn over a weekend and still keep going. The rubber strap closes with a folding clasp, practical for a case built with diving in mind. Blancpain rates the case to 300 metres.