The Blancpain Bathyscaphe Quantième Complet Phases de Lune – Ref. 5054-1110-B52A elegantly unites traditional Swiss complications with the rugged spirit of the Fifty Fathoms dive watch. Housed in a 43mm stainless steel case, this Bathyscaphe model brings a refined versatility to the collection with its unique combination of complete calendar and moon phase display—a rarity among professional-grade dive watches. The brushed finish and clean, geometric lines of the case maintain the tool-watch DNA while offering a sophisticated, modern profile. The sunray-brushed meteor grey dial serves as a striking backdrop for the calendar layout, featuring a day and month aperture at 12 o’clock, a date hand encircling the dial’s edge, and a beautifully detailed moon phase window at 6 o’clock. Luminescent hands and markers ensure readability in low light, while the unidirectional ceramic bezel offers scratch resistance and precise dive timing. The watch is paired with a black sail-canvas strap, chosen for its durability, water resistance, and comfortable wear — making it perfect for both everyday use and aquatic adventures. At the heart of this timepiece is the Blancpain Caliber 6654.P, an automatic movement known for its reliability and smooth operation of calendar complications. The movement features a free-sprung balance with silicon hairspring, providing excellent magnetic resistance and long-term accuracy. A 72-hour power reserve ensures the watch keeps running smoothly even when set aside for a few days. Viewed through the sapphire caseback, the movement reveals traditional Swiss finishing, showcasing Blancpain’s heritage in fine watchmaking. With 300 meters of water resistance, this Bathyscaphe is a rare example of a diver that offers both deep-sea functionality and elegant complication.

Your deBoulle order will arrive securely via courier, requiring an adult's signature and ID upon delivery. Currently, we can't offer specific time slots, but you'll receive tracking details and estimated delivery dates via email. Delivery within the United States is complimentary. Items are discreetly packaged in branded deBoulle boxes with unmarked external packaging for security. If missed, deliveries can be rescheduled through our Ambassador or courier directly. You can also opt for in-store collection at our Dallas or Houston locations, where you or an authorized individual can pick up your order with proper identification and order confirmation.

Returns or exchanges of your online order can be made within 30 days, either by contacting a deBoulle Ambassador to arrange complimentary online collection or by visiting our Dallas or Houston stores. All returns and exchanges require items to pass a quality control inspection, and refunds typically appear within 10 business days. Customized, bespoke, engraved, or preowned timepieces cannot be returned or exchanged. Gift recipients may return or exchange items, though refunds will be credited to the original purchaser. Items must be unworn, pristine, and include original packaging and certificates.