The Tornek-Rayville TR-900

The watch was made under U.S. Military Specification - Mil-W-22176(SHIPS) / WATCH, WRIST, SUBMERSIBLE (400-FOOT), NON-MAGNETIC. Mr. Tornek worked with the Blancpain Firm and based his design on the Fifty Fathoms which was already in production. The watch uses the AS1361 movements which were also used in the Fifty Fathoms of those years and the luminous material used is Promethium 147 (half life 2.5 years), not to be confused with PM-145 (17.7 year half life).