The Blancpain Fifty Fathoms Bathyscaphe Chronographe Flyback Ref. 5200-3640-76S is a striking combination of haute horlogerie craftsmanship and professional dive functionality. Crafted entirely in 18k Sedna gold—a proprietary rose gold alloy designed for enhanced durability and long-lasting color—the case and integrated bracelet give this timepiece a commanding and luxurious presence on the wrist. Measuring 43.6mm in diameter, the watch is bold yet balanced, offering everyday wearability with an undeniably elevated finish. Its radiant Sunburst Blue Dial captures and reflects light beautifully, providing a rich ocean-inspired backdrop to the watch’s chronograph displays. The dial includes three recessed subdials, a date window between 4 and 5 o’clock, and Super-LumiNova® hands and hour markers for maximum visibility. Encircling the dial is a unidirectional blue ceramic bezel, inlaid with Liquidmetal® to ensure long-term scratch resistance and timing accuracy. The full Sedna gold bracelet, with a secure folding clasp, enhances the piece’s elegant silhouette while offering durability and comfort. Inside, the watch is powered by the in-house Blancpain Caliber F385, a high-frequency automatic chronograph movement beating at 5 Hz (36,000 vibrations/hour). This allows for highly precise time measurement, with a flyback function that enables instant resetting and restarting of the chronograph with one push. The movement features a column wheel and vertical clutch, ensuring smooth and reliable operation. A sapphire caseback reveals the meticulously finished movement, complete with a gold rotor engraved with the Blancpain insignia. With 300 meters of water resistance, this watch is a true dive companion that blends tool-watch toughness with unmistakable luxury. The 5200-3640-76S is ideal for collectors and enthusiasts who demand both uncompromising performance and refined aesthetics — a testament to Blancpain’s dual mastery of innovation and tradition.

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.