Jai une montre de poche avec échappement à détente comportant une signature derriere le cadran : Pr H MATHEY LOCLE
Quelqu'un connait-il ce fabricant?

Bonjour Monsieur Hoche,
Comment allez vous?... Nous ça vat bien...
Bonne journée,

Dearest Gentleman ; please excuse me if I am not so fluent in the French language :

Apparently, Mathey is a very common Swiss name and Locle was one of the centers of watchmaking in Switzerland. Jules Mathey could have been either a watchmaker or a jeweler who sold watches. I can tell you my watch has the "classic" bar movement layout & dates around 1860s. Also, there is another Jules Mathey watch on display at the National Watch & Clock Collectors Museum in Columbia.

It is a real pleasure for me, Dearest Gentleman, to give you such information ; please feel free to ask more questions !

I am so proud to be able to help you !