Does this movement have all the right components? http://www.ebay.com/itm/OMEGA-Seama...tified-Calibre-351-OR-MASSIF18K-/290962246414Purchases made through these links may earn this site a commission from the eBay Partner Network
What could have been the reason to replace that bridge while everything else looks pretty much minty, all inside a gold case? From my untrained eyes, all look exactly the same as those on a cal. 532, except the number 351, serial number and "Fabriqué en Suisse". The case back doesn't have a ref. number, does that mean anything?
The case is probably French made therefore wouldn't have Omega case #. Since gold was very expensive to import this was common occurrence. Don't know why this would have been done to the movement, part was broken/malfunctioning? Maybe it's a cal. 351 movement and not correct to the dial, or maybe the correct part was not available and the 351 part was interchangeable, so they used it instead?
there is no good reason to replace the bridge...To me -The bridge looks consistent with the rest of the movement-so IMO It is reasonable to think that it is original... maybe they had an extra 351 bridge that they wanted to use...or one got mixed in error with the 352's....
It's as well to bear in mind that factories do make mistakes and errors in production, although this is probably pretty rare with a company like Omega. Nonetheless, in 1969 for example, Omega produced in excess of three million movements, if you believe the s/n figures. Just now and then, the odd rogue may slip through. I have a (completely genuine) 1960s Hasselblad Zeiss lens which is stamped "MADE IN ERMANY", for example.