Its big red button made this one of the most iconic dive watches ever made, the Omega 'Seamaster 600' is known universally as the Ploprof! Here, in the rarer 'inverse form' and fitted to the 'shark-proof' milanese bracelet with seat buckle clasp. The original mark I dial (supplied) has aged over time with a distinctive crystalline form so we have fitted the upgraded Luminova dial for legibility.