Blancpain Bathyscaphe Quantième Complet Phases de Lune

Blancpain's Bathyscaphe Quantième Complet Phases de Lune, reference 5054 0130 B52A, is a dive watch with a 43.6 mm ceramic case. The case measures 13.4 mm thick and carries a unidirectional rotating bezel for tracking dive time. A sapphire crystal covers the sunburst black dial. Inside is the self-winding calibre 6654.P.4, giving 72 hours of power reserve. The dial combines a full calendar with weekday, month and date, alongside a moon phase display and central seconds. A sail-canvas strap on a pin buckle closes the watch on the wrist. The case holds a 300 metre water resistance rating, generous for a watch built around a complication like this.