Sorry I missed that it was a pocket watch in your first post. Bestfit won't be much help as it only goes to about 22 lignes, where this would be more like 31 if the size you state is of the movement, and not the dial. To use the Bestfit system you would need a picture of the dial side of the movement with the hands and dial removed.
Looks like a reasonably high quality watch at likely 15 jewels. Might have gold train wheels as they look very much like tarnished gold.
Good luck as that might be difficult to identify. You could try posting in the vintage watch section on WUS, or also on the NAWCC forum pages (not the ones on WUS, but on the NAWCC's actual forums).
Cheers, Al
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