I recently acquired an automatic chrono (ETA 7751-based) from someone whose father had owned it. Watch is 10 years old and it sounds like it may have spent most of the last few years sitting in a safe. I shook it around gently and the seconds hand started moving smoothly, so I think it's basically functional (the guy said he had worn it a couple times and it seemed to work fine but he didn't know much about watches and didn't want to make claims he wasn't sure about).
My question is, would I harm the movement by winding it up and trying it out after it has sat so long? I don't live near any watchmakers (I'm in the Allentown/Bethlehem area in PA) and don't want to spend money on a mail-in check-up unnecessarily, but also don't want to damage the watch. Any advice would be appreciated. Thanks.