Omega 'Symbol' Quartz, ca. 1989

Opened this snap-on case back driving the fingernail of the index around the circumference
While the Seamaster 1/100 Quartz Chronograph was locked like a atomic bomb shelter, this one opened with the use of a fingernail! And after I opened it, I immediately remembered that I had been wearing this watch in the swimming pool of the Radisson hotel in Redding, UK. I was attending training in the UK and had bought this watch at Zurich Airport, almost missed the plane because of it too. And I also remember that one of my work colleagues asked me, whether it was really safe to wear a dress watch like this in a pool... No, I am not going to wear it for swimming anymore :)