A cult entry in the Fifty Fathoms line, this Milspec 1 shows Blancpain's utilitarian dive-watch language in a civilian stainless steel case from 1965. The 41mm case and black dial keep the design plain and purposeful, and the rubber strap fits the watch's functional bent. Automatic winding suits the brief. On the wrist, it has the compact, tool-watch balance collectors look for in early Fifty Fathoms examples.