An actual Elgin clutch is the upper left part. The lower left is a mystery part found in this watch.
It's probably not fair to think very many people would spot this. Having done a thousand of them, I could probably disassemble a 12 size Elgin with my eyes closed though. This weird substitute part stuck out immediately.
The watch is an Elgin grade 315, 12 size, 15 jewels, made about 1925.
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