1975
Professional Diver 600m
A full-fledged diver’s watch set within the world’s first titanium case, with a one-piece structure and saturation diving capacity to 600 meters deep. More than 20 patents were awarded for the design of the watch casing alone, including patents on airtightness and durability.
| Name | Professional Diver 600m |
|---|---|
| Time/Period | 1975 |












