Blancpain Fifty fathoms Rotomatic 1950'sThe Blancpain Fifty Fathoms holds a legendary place in dive watch history. The name Fifty Fathoms might sound unusual at first, but it refers to a British unit of measurement. One fathom equals roughly six feet, so fifty fathoms translates to about 91 metersor close to 300 feetthe maximum depth divers could reach with the technology of the era. Over the decades, Fifty Fathoms watches have earned serious credibility through military use, trusted by