Markbone1
·Thought I'd offer this up to the experts. I am wondering if this is a Seamaster Ref. 165.020 or a 166.020? It came out of a safe deposit box. Also, is this possibly an unmarked De Ville? I do not have a way of getting the back off safely, but I know the forum is very helpful in these matters. I believe the dial furniture is gold plated, since I do not see a sigma indication. Any help would be gratefully appreciated. Cheers!