i am sorry to say i think if you do a little searching on OF you will see 99% would advise NOT to send a vintage watch back to manufacturer for service (the only exception is patek). the stories range from bad to horror show
the only nice thing i can say is if they sent you back all the old parts they haven't destroyed any value. . .if they hadn't sent you back the old parts they have completely destroyed the value someone will pay for your watch
i would put the whole thing back together as it was and send it to a real vintage watch maker to service it. and once you find a good vintage watchmaker this is the ONLY procedure i would every follow with an investment grade vintage piece
sorry to be the bearer of bad news. if you like the way it looks, wear it, but by all means keep all those old parts and protect those hands!
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