Considered by many to be the first true dive watch as we know the genre today, the Blancpain Fifty Fathoms, first launched in 1953, became a hit around the world with militaries and professional divers alike. Now, more than 60 years later, Blancpain has chosen to commemorate the early years of the Fifty Fathoms by releasing a tribute to a specific model from 1957/1958 called the Mil-SPEC 1.