This is inside an Allen Wales (Model 9E) adding machine. It was manufactured in the late 30s or maybe sometime in the 40s from what I've read. There are notes from a technician scratched on the inside of the bottom cover of some maintenance done on it on 6/27/52, but only some springs and bushings were replaced, and it was cleaned/oiled.
I've unscrewed the mount holding it in place and looked around the other side and didn't see any markings other than the ones in the picture. Is there any way to identify this, or figure out a suitable replacement?