This was my first ever dive watch. I certified at 13 years old (I’m now 75). My parents bought me this exact watch for my birthday. I wore it through hundreds of dives and lost it in 1967. It was bulletproof but I never appreciated it as much as I should have. I replaced it with an Omega Seamaster 300 in 1967 and replaced that with a Tudor Sub in 1984. Thanks for bringing back the memories.