Having found this one ( https://www.ricardo.ch/kaufen/uhren...rofessional-mark-iii-automatic/v/an710480600/ ) on swiss auction site ricardo.ch, I started my internet investigation. To me, Crystal, Bezel and Tachymetre-Ring look different, than on this one ( http://img291.imageshack.us/img291/7052/014tu.jpg ). What do you think about the offered watch in general and the parts in question? Thank you very much.
That isn't a Speedmaster Mk III. It looks like a 176.007 Seamaster with the wrong dial. The two watches have the same movement, so incorrect replacement dials sometimes get put on. If the dial has had to be replaced at some point then this is either a franken watch or it's a legit 176.007 that has taken a beating somewhere down the line. Either way, it's best to walk away.