Blancpain Bathyscaphe Quantième Complet Phases de Lune

Blancpain's Bathyscaphe Quantième Complet Phases de Lune, reference 5054 1210 98S, is a 43 mm titanium case built for diving with a full calendar on board. The case measures 13.4 mm thick, with a lug width of 23 mm, and pairs with a sapphire crystal over a grey dial. Inside is the self-winding calibre 6654.P.4, giving 72 hours of power reserve. The watch combines a moon phase display with a complete calendar showing date, weekday and month, plus a central seconds hand. It comes on a satin-brushed titanium strap secured by a folding clasp. The same titanium case is rated to 300 metres of water resistance, unusual depth for a watch carrying this much complication.