Blancpain Bathyscaphe Quantième Annuel

Blancpain's Bathyscaphe Quantième Annuel, reference 5071 1110 B52A, is a dive watch with a 43 mm steel case. The case measures 13.1 mm thick and carries a unidirectional rotating bezel, with a sapphire crystal over the dial. Inside is the self-winding calibre 6054.P.4, which stores 72 hours of power reserve. The sunburst meteor grey dial pairs an annual calendar with central seconds and a date display, a useful combination for a watch built around calendar tracking rather than pure timekeeping. A sail-canvas strap closes with a pin buckle, and the lug width measures 23 mm. Rated to 300 metres, the case keeps its dive-watch credentials despite the added calendar mechanism.