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First, thank you all for your help. I’ve been reading several posts that have helped me since I first joined several weeks ago. I’ve been very fortunately the last year or so learning watch repair as a hobby. It’s been very rewarding and fun (as all of you know :P) A few months ago, I drunk bid, and won, this Zodiac Seawolf on eBay. It was supposedly running and then stopping after a short while (which was true). However, during disassembly I found it was missing the case tabs, hacking/stop lever, and most of the date mechanism parts. I was able to get it appart, cleaned, and luckily with a donor Aerospace GMT for the date parts, was able to get it back together and running. I put the balance in and the hairspring adjusted, I put the automatic winding mechanism on and the watch went completely out of adjustment. After removing the auto winding mechanism, I noticed that the hairspring was touching itself. So I removed the balance, made sure the hairspring was back in position, reinstalled it adjusted it, and after putting the auto parts back on it was running ok. Then I cased it, and again it went completely out of adjustment. I’ve been through this exercise several times now, and even tried with the balance from the Aerospace GMT donor I have with the same results. The last time, I tried to check that the rotor wasn’t hitting the balance, and it doesn’t appear that it is (at least I can’t see where it would be). I’ve demagnitized the movement and case several times too. I’m still missing the stop lever and one of the case tabs, but I wouldn’t think either of those would cause this kind of havoic on the balance. Does anyone have any guidance on what to look for which might be causing my balance(s) to go wonky? Below are pics. Original balance in: Everything looks ok and adjusted (not great but ok): Auto on: Everything still looks ok: Just about to case it and then decided to check one more time and hairspring look ok from what I can see. WOW Look at that shotgun scatter pattern: And it’s wonky again :pulling-hair-out: