The Vintage Wrist Watch Company has dated this piece to the 1910s.
The movement is a Montilier 662. Montilier movements were commonly used in early Rolex pocket watches, particularly in the 1920s to 1940s, as Rolex did not produce their own pocket movements, relying instead on manufacturers like Montilier, Cortebert, and G Thommen. The movement is protected by an inner hinged cover.

The watch measures 52mm diameter excluding the winding stem and the loop. The case is silver and there are hallmarks inside all three covers for Birmingham 1922 with a case maker’s mark for the Birmingham case maker Aaron Dennison, supplier of cases to many watch manufacturers including Rolex. The case is in super condition and has nice crisp engine turned detail to both the front and back.

The winding crown pushes in to open the front cover.
The glass lens is in beautiful condition, as is the dial with blued steel hands, a subsidiary seconds dial and outer minute markers.
The watch comes in a new presentation box.
The Vintage Wrist Watch Company has dated this piece to the 1910s.
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