Blancpain Fifty Fathoms Automatique

Blancpain's Fifty Fathoms Automatique 5015D 1140 52B is a steel dive watch with a 45 mm case. The case measures 15.5 mm thick, and the lug width comes in at 23 mm. A sapphire crystal covers the sunburst blue dial, which carries a central seconds hand and a date window. The self-winding calibre 1315 drives the watch and stores 120 hours of power reserve, well beyond what most automatics manage. Blancpain fits the case with a sail-canvas strap on a folding clasp. This is a proper tool watch in scale as well as name. Rated to 300 metres, the case holds up to genuine diving use rather than just splashes.