BOURQUIN & FILS, GENEVA Switzerland. This watchnaker was into high-end watches & repeaters.
Here we have this nice late 1800s-early 1900s antique pocket watch movement from a watchmaker estate. No second pinion (hour and minutes only), can't tell if hunter or open face style as I have seem both configurations. No dial (it was a 2 feet), no hands. Seems than at least a wheel is missing on the dial side.
Measures 42.8mm, roughly equivalent to our 16 size in USA. We work very hard to describe our items at the best of our knowledge, ask any questions if you are not sure.