Mvmnt. Caliber FE2D1 (Eta 2451) automatic Variant: Black Dial that uses TRITIUM (small T above the 12 marker) as its luminous material, marketed as a "skin diver" or recreational watch suitable for shallow diving and swimming, paired with vintage NASA bracelet by JB Champion USA
Friction mounted bi-directional bakelite bezel using a solid stainless steel case top loader or front loader watch case design which is a one piece case with no separate case back, the movement is inserted through the top or front opening. This design is was common in military watches like the Benrus Type I and Type II models, which were developed in the 1940s and 1950s for improved waterproofing and simplify construction.