Thanks for the imput. The seller's pics are very poor. Here is one of the movt to which i gave a little "twist"

The "heuer" engraving on the rotor is not convincing, altough the dial markings appear to be correct (shape, fonts, etc). I tried to make some research but did not find another one except for the waltham on "watchismo.com" (thks kristian).

the asking price is also a bit steep...

Regds
F.