The original Hamilton Frogman was created for U.S. Naval 'Frogman' teams and featured in the 1951 smash-hit movie 'The Frogmen'. Almost 70 years have passed since then and watchmaking technology has come a long way. What hasn't changed are the vital features that made the watch as big a hit as the movie: Uni-directional rotating bezel, supreme water resistance and underwater luminescence.