The original Hamilton Frogman was created for American Navy divers and appeared in the famous 1951 film "The Sea Frogs". Almost 70 years have passed since then and technology has made great strides in watchmaking. The essential characteristics that have made the watch successful, not less than that of the film, are however the same: unidirectional rotating bezel, high impermeability and underwater luminescence. Three-sphere movement with date and power reserve greater than 80 hours, the H-10 features elaborate colimaçon and pearly contrasting patterns for the American Classic models and clean surfaces for the pilot's watches.