Blancpain Fifty Fathoms Bathyscaphe Annual Calendar 5071-1110-B52A

About This Watch

The Blancpain Fifty Fathoms Bathyscaphe Annual Calendar is a rare combination: a serious 300-meter dive watch housing a complete annual calendar with moon phase. The annual calendar requires correction only once per year at the end of February, providing practical convenience over a simple calendar. The caliber 5054 displays day, date, month, and moon phase while maintaining a relatively compact 14.2mm case thickness considering the complication density. The blue dial arranges the calendar displays with the legibility essential for a dive watch: day at 9, date at 3, month at 12, and a large moon phase at 6. The ceramic bezel and 300-meter water resistance maintain genuine aquatic capability. The moon phase display, often considered a purely aesthetic complication, actually has functional relevance for divers, as tidal patterns are influenced by lunar cycles. This watch demonstrates that haute horlogerie complications and professional dive watch performance can coexist, a proposition few other manufactures attempt at this level.