Your way ahead of me, Mike. I leave the battery changing to my watch guy. My eyes, and hands just aren't that stable anymore. (LOL)......I'm in the position of not having to worry about "Old" watches. With three Grandsons, and a 19 year old, Great Grandson, they always find a home, and in most cases, sooner, not later! (LOL) At least I've been able to teach the boy's to take proper care of them. (They don't want to tick off GramPa) .....I hope you will be able to recoop a little of what went out the door when you bought them. It never hurts to have a little extra "Pocket Change" if you find something interesting, Here is wishing you the best your way this summer, my friend!