Omega

That's what i read on the Internet. I recently bought a PP 600 that was back from a full restoration from Bienne. Everything but the caliber was changed to new parts. Including the case. And I'm wondering if service cases are also in 904L. ...  

Or maybe it would be too much weffortrk to chase down through their purchasing dept... Hmm. Does it matter what the case is made of? Cazalea

. . . thanks for sharing this information. I knew they had hands and dials, but not cases. Art

So the watch is basically new; case, bezel, hands, crystal etc. Only the movement is from a previously sold watch. So what do we call this watch then? New old stock? Regarding your question; Omega can surely answer that for you. Lovely watch; I’ve always ... 

. . . and carry the movement number over to the new case? I'll have to ask a contact at Omega. I've no idea how restorations this extensive are handled. Reputedly Watchco SM 300 rebuilds were considered authentic by Omega as they were built with genuine O... 

When you get an extract from the Archives they confirm the production date and where it was sold / country based simply on the mouvement number.

. . . on the 'net. Ref 166.077 cases aren't serialized. Impressed, Art

These were true tool watches used by professional divers they did not have time to waits weeks for service so the watchmakers would have a clean serviced unit ready to go.

. . . I wasn't aware of. Three out of five won't pass an extract request? That's disturbing, to say the least. 😱

however you may have an older or a new production date that will not correspond to the configuration of the watch. This is where the 60% mismatch arises. So it takes a lot of work and many watches to get the right matching sets of which there are not many... 

. . . regarding watches totally revamped during service. If Omega has all the parts and they're required to bring the watch back to specification, then Omega would notate their records and recognize the watch as authentic. I'd be curious to see the docume...