Blancpain launches 3rd limited-edition watch to mark 70th year of Fifty Fathoms.

Blancpain’s Fifty Fathoms 70th Anniversary Act 3.

In the 1950s, when the French navy was searching for a diving watch for its newly formed Combat Diving Corps, they discovered that the watch industry had little understanding of the needs of divers.

Their initial test of watches found on the market ended disastrously; the tested watches leaked, were small, and difficult to read underwater.