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Hamilton 987-E Balance End Stone


les13

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You need to release the stud, that's the triangular piece, by loosening the screw, bottom right. Then you can remove the balance from the cock and clean and oil the jewels from the other side. There may even be screw heads there, to allow disassembly.

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25 minutes ago, Tudor said:

I think the top pivot is out of the jewel in the top and pulling the hairspring to one side.

Very true, I think also the angle of the shot may make things look out of shape when they're not.

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When I first pulled the balance I noticed the hairspring was not centered. I ran the whole piece over the demagnetizer, but there was no change. I will disassemble, as advised, and oil the jewel and see if I can improve the hairspring.

Thanks everyone for the help.

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