Blancpain Fifty Fathoms Chronographe Flyback Red Gold 45mm Black Dial 5085F 3630 52B - BRAND NEW

The Blancpain Fifty Fathoms Chronographe Flyback reference 5085F-3630-52B is one of the most compelling expressions in the entire Fifty Fathoms collection — a 45mm red gold chronograph that bridges the heritage of professional diving instrumentation with the grandeur of haute horlogerie. Brand new and complete, this watch is available now at Bizak & Co., where discerning collectors can acquire it with full confidence.

The Fifty Fathoms story begins in 1953, when Blancpain introduced what many historians consider the world's first modern diving watch. The model was developed in collaboration with French Navy combat divers and set the template for the tool dive watch: a large, legible dial, a rotating bezel for elapsed-time measurement, and a robust water-resistant case. More than seven decades later, the Fifty Fathoms remains Blancpain's flagship sports collection, and references that layer additional complications onto that storied foundation — such as this flyback chronograph — occupy a particularly prestigious place in the lineup.

Reference 5085F-3630-52B distinguishes itself immediately through its case material. The 45mm case is crafted in 18k red gold, a warm, richly saturated alloy that contrasts dramatically with the deep black dial and the cool, luminous sapphire crystal bezel. The sapphire bezel is a signature detail of the higher-end Fifty Fathoms Chronographe variants, replacing the ceramic or aluminum bezels of entry-level dive watches with a material prized for its extraordinary hardness and optical clarity. The black dial is dressed with index hour markers that maximize legibility at a glance, honoring the instrument-watch DNA of the original Fifty Fathoms.

At the heart of this watch is an automatic flyback chronograph movement — a sophisticated complication that allows the chronograph to be reset and restarted instantaneously with a single push of a pusher, rather than requiring the conventional stop-reset-start sequence. This functionality, originally developed for aviation and motorsport timing, adds genuine utility to the watch's already impressive technical profile. Blancpain's in-house manufacture movements are celebrated throughout the industry for their finishing quality, reliability, and horological integrity.

On the wrist, the 5085F-3630-52B makes an unmistakable statement. At 45mm in red gold, it wears with authority and presence, the warm case catching light differently from a steel or titanium alternative. The rubber strap keeps the overall aesthetic sporting and comfortable, ensuring the watch sits securely during active use while remaining easy to pair with casual or smart-casual attire. The combination of precious metal, technical complication, and dive-watch proportions is rare and highly collectible.

Bizak & Co. offers this brand-new Blancpain Fifty Fathoms Chronographe Flyback 5085F-3630-52B with complete box and papers, ensuring full manufacturer traceability and warranty coverage. Whether you are an experienced Blancpain collector seeking to add a standout red gold complication piece to your collection, or a first-time luxury watch buyer looking for a timepiece that will hold meaning and value for decades, this reference deserves serious consideration. Reach out to the Bizak team to discuss acquisition, pricing, and any questions you may have.