I was bored and grabbed and old Elgin 643 out of my junk box to work on. Before disassembly It appeared the ratchet wheel was turning as it should when wound but watch never ticked. After taking off barrel bridge I noticed the arbor was completely flush with the bridge and ratchet wheel. was not engaged so simply spun on top of bridge. I don't think I have ever seen this. Ratchet wheel has no wear marks, so how does this happen? It is hard to really see how flush the arbor is with the bridge in this pic, but not a mm is above bridge.
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