Blancpain Fifty Fathoms 5015-11C30-52A

This is the “Tribute to Fifty Fathoms MIL-SPEC,” a 500-piece limited edition from 2017. Its significance is rooted in its faithful homage to the 1950s Fifty Fathoms designed for military use. The watch’s defining feature is the functional water-tightness indicator at 6 o’clock, a two-tone circle that changes color if moisture enters the case, a critical feature of the original MIL-SPEC models. Housed in a 45mm polished stainless steel case, it features a matte black dial with vintage-style lume. It’s powered by the Caliber 1315, which has a 120-hour power reserve and a special NAC-coated gold rotor. This is a highly sought-after tribute to a legendary military-issued dive watch.