The Vintage Wrist Watch Company has dated this piece to the 1920s.
The movement has been identified as being by Fabrique d'Horlogerie de Fontainemelon, an ebauche (blank movement) manufacturer.

The watch measures 30mm diameter excluding the winding crown and the fixed lugs so it would suit a slimmer wrist. The case is silver and there are hallmarks inside the case back for Glasgow (import mark), 1926 with a sponsor’s mark for Sylvain Dreyfuss (a watch importer who went on to found Rotary watches). The case is in lovely condition, especially for such an early piece.

The lens is in lovely condition too.
The dial is in good original condition with original blued steel hands, a subsidiary seconds dial and an outer minute track. There is some age related darkening to the dial but it is still easy to read the time.
A new leather strap has been fitted.
The watch comes in a new presentation box.
The Vintage Wrist Watch Company has dated this piece to the 1920s.
Specialists in antique and vintage wrist watches and pocket watches
You can view the stock and full dealer information on the The Vintage Wrist Watch Company Profile Page