Sergio Garcia swatch, not working properly

[Craigybaby69]

Evening folks, my first time in the watch section, looks splendid. I've got a Sergio Garcia swatch, just put a new battery in after lying dormant for 10 years, a renata, off amazon for a quid. The second hand stops about twice every minute, for about a second, so it's losing about 2 or 3 seconds a minute. Bizarrely though, when I took it off last night, I set the correct time just to see how much it was losing over 12 hours but this morning it was showing the correct time! So it appears wearing it is making it stop briefly. Any ideas why please?
Regards Craig

Edited by Craigybaby69 on Wednesday 22 January 17:59