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I'd advise not taking the movement apart unless you've found the manual and ideally also someone online that's written about servicing it. Even then it may be difficult. I took apart a really nice Timex watch and learnt the hard way that I'd need around 7 hands to get it back together again...
A lot of people take the movement out of the case and dial off, then dunk in lighter fluid, reverse and pray. Obviously you wouldn't do this with a more expensive watch but Timex's can be really difficult to get back together again. Not necessarily recommending this, but it could be worth a shot depending on how expensive yours was.
Alternatively have a look at the hands and make sure they're clear from each other, common if someone like me has tinkered with it.
Rightly or wrongly I’ve bought a watch that’s not 100% working. Selling says this below.
Is there anything basic I could try to remedy the problem?
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