Hello everyone. I've been looking at this watch. This is an unsigned pocket watch with a cylinder escapement. It looks very old.
It's the back of a pocket watch bearing a famous name, but also lacking another famous name. I doubt that the watch pre-dates 1819 when the two names became the one "haute horlogerie" brand that exists today. Another interesting thing is that watches with illustrious reputations have been faked for many many years, even as far back as the mid 19th century. Do you have any more information and pictures? I'll go and get a coffee.
I've seen a very similar movement recently. Doubt I can find it again but I'll look. What does the dial look like?
Swiss watches of the era this one is from are next to impossible to identify most of the time. They came to see the light of day as a result of numerous specialty manufacturers that produced only a few of the parts. Wheel makers, pinion makers, escapement makers, screw makers, plate makers, etc etc. The parts being gathered in a shop somewhere, and assembled into a running watch. This one has a cylindr escapement- a type of escapement the Swiss stuck with for decades, after watchmakers elsewhere had abandoned it. Why? Because it was cheap. You’re “looking at it”, as in contemplating buying it? Good luck finding someone who can fix it when the time comes.
If you are looking at getting a late 19th century watch I'd say go with American, they are typically much better made than Swiss ones and lever escapements became the norm here long before they did in Switzerland.
Also a cylinder escapement is easier to break due to shock as the balance staff is recessed so much to accept the escape wheel, and they aren't nearly as accurate as a lever escapement.