This watch was one that passed though on 2013. It's a Waltham 1908 model, 16 size, 7 jewels. It has returned with a broken balance staff.
Many American watches, and quite a few Walthams have a friction staff. The staff is not riveted in, as the Elgins are.
It's really important not to chunk one of these up in the lathe and start cutting. The hub is actually part of the balance wheel.
In these first two images you can see the the hub is blued steel. This is a common (but not universal!) signal that we have a friction staff.
Here is the old staff with a broken pivot, pushed out of the balance wheel using a staking set.
Pushing in a new staff is a quick and easy job using an "Inverto" staking set, where stakes can be reversed into the base. But it is really important to use the right size stakes.
Quick test spin, looks good!
The watch has also suffered a broken roller jewel. I'll be fixing that and giving the movement an overhaul, which should be no unexpected trouble.
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