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.
In-Depth Review
# The Annual Calendar Deep Diver: Blancpain's Modern Take on Functional Luxury
Blancpain's legacy in diving watches runs deeper than most brands' entire archives, and the Fifty Fathoms Bathyscaphe Annual Calendar represents a thoughtful evolution of that heritage. The 43mm stainless steel case houses the in-house Caliber 5054, a movement that blends technical sophistication with practical reliability through its 72-hour power reserve and annual calendar complication. Rather than chasing chronograph complexity, Blancpain has chosen restraint: the dial displays month, date, day, and moonphase information alongside 300-meter water resistance and a unidirectional ceramic bezel. This purposeful specification list reflects a brand confident enough to omit features rather than accumulate them. The blue dial paired with the canvas strap strikes an intentional aesthetic balance between tool and refined instrument, acknowledging that serious divers don't always wear neoprene.
This watch appeals to a specific collector: someone with appreciation for historical diving watch design who values having genuine utility within their luxury purchase. The annual calendar complication eliminates the need for manual date adjustment until 2100, making it genuinely useful for professionals and travelers alike. It's equally suited for the collector who owns several dive watches but wants one with meaningful complications beyond the standard date window.
In the contemporary luxury sports watch market, the Bathyscaphe Annual Calendar occupies an interesting middle ground. Priced around $17,000-$19,900, it competes with offerings like the Tudor Black Bay Chronograph (roughly $10,000 less) and the Omega Seamaster Annual Calendar (similarly positioned but with quartz alternatives). Blancpain's pure mechanical approach and uncompromising Swiss manufacture justify its premium, though buyers should recognize they
Specifications
Movement
| Movement Type | Automatic |
|---|---|
| Caliber | Caliber 5054 |
| Power Reserve | 72 hours |
| Frequency | 28,800 vph |
| Jewels | 33 |
Case
| Case Diameter | 43.0mm |
|---|---|
| Case Thickness | 14.2mm |
| Case Material | Stainless Steel |
| Crystal | Sapphire with anti-reflective coating |
| Bezel | Unidirectional rotating, ceramic insert |
| Dial Color | Blue |
| Lug Width | 23mm |
| Lug-to-Lug | 48.0mm |
Features
| Water Resistance | 300m / 984ft |
|---|---|
| Bracelet/Strap | Blue sail canvas strap |
| Clasp | Stainless steel folding clasp |
| Weight | 132g |
| Complications |