Archer
··Omega Qualified WatchmakerBut when it comes to watches and especially manufacturers own mechanisms you need to convince yourself about what is being fitted if it not serviced ( there you go, I used that word) by the OEM. No problem using third parties as long as they know what the OEM knows.
It's a risk. Do your own assesment. After all, it's your watch and your money. And that's why watch " servicing" costs.
I'm not sure what parts you are referring to specifically, but if it's movement parts, there's very little "risk" of someone using "third party" produced parts for most brands. Other than the odd discontinued 321 chronograph parts like the elusive hammer spring, there aren't very many "reproduction" Omega movement parts out there. The same goes for most "in-house" movements - the only choice is OEM parts for the most part because others simply won't work.
The one big exception to this is Rolex, as there are lots of cheap knock-off Rolex movement parts out there. I ordered some genuine Rolex movements parts for a ladies caliber a few years ago, and my local parts supplier sent me generic parts. The new generic parts had pivots that were rougher than the worn parts I was trying to replace. I retuned them and told that place not to send me generic parts again. I ended up getting them from another watchmaker who had a parts account in the US, but those days are long gone with Rolex closing down most of the accounts. I have decent stock of vintage Rolex movement parts for some calibers, but other than that I don't service them much anymore.
I do suggest that you speak to the watchmaker about parts and where they get them from, and make sure that they are using genuine parts. For brands like Omega, this is mostly an issue with case parts, like non-OEM crystals for example.
Cheers, Al

