Blancpain Bathyscaphe Quantième Annuel

Blancpain's Bathyscaphe Quantième Annuel, reference 5071 1110 70B, is a dive watch with a 43 mm steel case. The case measures 13.1 mm thick, with a lug width of 23 mm. A unidirectional rotating bezel surrounds the sunburst grey dial, and the whole thing is capped with a sapphire crystal. The self-winding calibre 6054.P.4 drives the watch, offering 72 hours of power reserve. Beyond the central seconds and date, the movement carries an annual calendar, a complication rarely paired with a dive watch case. It comes on a steel strap with a folding clasp. The case is water-resistant to 300 metres, a serious depth rating for a watch built around a calendar function.