Blancpain Fifty Fathoms Automatique

Blancpain's Fifty Fathoms Automatique, reference 5010 3630 B64A, comes in a 42.3 mm red gold case. The case measures 14.3 mm thick, with a lug width of 21.5 mm suited to the rubber strap fitted here. Sapphire crystal covers the black dial, which carries a date display and a central seconds hand. The self-winding calibre 1315 drives the watch and stores 120 hours of power reserve, well beyond the usual two or three days seen in this class. A pin buckle closes the rubber strap. This reference sits within Blancpain's dive watch line, though its gold case and finish lean toward dress wear as much as diving use. Water resistance is rated to 300 metres, a figure that still nods to the model's diving origins.