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Mainspring Broken At Arbor End


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Attached is a picture of a mainspring from a watch I'm working on.  I took the mainspring out of the barrel to clean and lubricate it but when I was about to put in back in, I noticed it was broken at the arbor end.  did I do it, I ask myself?  Well, id took the picture before I removed it from the barrel and it looks like it was already broken, but I need a more expert eye to confirm it.  I'd appreciate your diagnosis.  Thanks!

post-940-0-11925000-1434819523_thumb.jpg

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The inner coil appears to be completely separated from the arbor. It should normally be hooked onto the arbor at about 5-o'clock.

Is there still a hole in the spring at the end of the inner turn? If so then you might just tighten up the first turn with a fine pair of round-nosed pliers.

Edited by cdjswiss
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