Blancpain Fifty Fathoms Nageurs de combat

Blancpain's Fifty Fathoms Nageurs de combat, reference 5015E 1130 B52A, comes in a 45 mm steel case. The case measures 15.7 mm thick, with a lug width of 23 mm, and the dial sits under a sapphire crystal. Inside is the self-winding calibre 1315, with a power reserve of 120 hours. The black dial shows a central seconds display and a date window. A sail-canvas strap closes with a pin buckle. This is a watch built for military divers, and the case is rated to a water resistance of 300 metres.