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Greetings all. I think I may have made a mistake in buying a GP watch that has the 641-875 quartz movement in it. It's a nice looking watch, with a very solid case, but I didn't find out about the caliber number until after I bought it. The seller did not have an image of the movement. Since I usually like GP movements, I thought it was worth a little gamble on getting it running, even if I had to clean it. After the auction ended I found out about these GP quartz movements that are impossible to get parts for, and that the dead ones usually need a circuit that is made of unobtainium. Since the watch had an old battery (Union Carbide brand) in it I figured that I might get lucky and get it running with a fresh battery. I wasn't counting on that happening since the guy who sold it was a watch guy. It would be hard to believe that he didn't at least try a new battery in there. Anyway, it didn't get it running. Does anyone know about these rather interesting old quartz movements? I believe it is from the late seventies perhaps? Is there any use in seeing if one of those quartz movement "spinners" could free things up? Unfortunately, it's not like GP provides technical info the way a company like ETA does, so if I take it apart I'll have to take a lot of images as I do. Anyway, any help on this is appreciated. Thanks ahead of time. Stay healthy, all. Cheers.