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Fresh battery and shooting a test roll is a good idea (and even more so if you're quite methodical about it, as in: shooting a wide variety of (lighting) situations, and noting down on a piece of paper what shutter speed and f-stop was used for each of the frames, so you have a bit of a clearer idea what might be wrong if pics aren't properly exposed), you could use any (cheap) film for this.
Check the light seals of the camera (the foam stuff along the edges of the film door in the back, especially near the hinge - if this feels quite dry / crumbly / sticky there might be problems with light leaks - but you'd also see this when developing your test roll.
Nice camera by the way, have fun! 🙂
Mentioned to my other half about maybe taking up some new hobbies over the winter instead of doing nothing like I normally would, and mentioned maybe some photography for a laugh. She then pulls an OM-10 out of storage; couldn't believe it really.
I've put some batteries in and most of the mechanisms seem OK, but is there anything else I can do with testing it? I've got some Kodak 200 arriving today so one will be a test roll (unless I should use something exceptionally cheaper). I've got the manual downloaded now as well. I'd planned on taking it to a shop (I'm in E3 so suggestions welcome) to see if there was any defects, but if it makes more sense to just shoot a roll and see what happens then I'll do that...