Hello, I know the watch, second version with silver pearls, it has been offered on Ebay USA for a long time.
The repair and overhaul should cost a few hundred euros.
Probably the bottom cover has been swapped, which unfortunately is depreciated
These watches always have a shock protection in the factory, if this is no longer available, as with this watch, it was replaced sometime after 1945!
Unfortunately, the case of this watch has been damaged by an improper attempt to open the base cover What has prevented me from buying the watch so far, despite a considerable price reduction, plus shipping, imports and VAT.