Found this going through my dad’s stuff…no clue on the origin, maybe won in a poker game, lol.
It has a fob from the Cadillac motor company, which my dad worked for once upon a time, but the fob was engraved with another guy’s name.
It wouldn’t run, but it was easily fixed, the balance wheel had popped out of its place (a divot, rather than a jewel), and a simple removal and reassembly has it running well, keeping time, and ticking louder than a grandfather clock.
It’s missing a crystal. Anything I need to know other than “measure the opening and order that size?”