The Vintage Wrist Watch Company has dated this piece to the 1910s.
The movement is working nicely. It is fully signed and the serial number 20,462,599 confirms the date as 1915.

The watch measures 35mm diameter excluding the onion winding crown and the fixed wire lugs. The case is silver and there are hallmarks inside the screw-on case back for Birmingham 1916 with a case maker's mark for Aaron Dennison. The Dennison Watch Case Co produced watches for many watch manufacturers but they had a particularly close working relationship with Waltham. The case is in good condition with just general surface marks, nothing too serious at all.

The lens is in good condition.
The signed white enamel dial has a couple of hairline cracks at the top of the dial but they are faint. Blued steel hands, a subsidiary seconds dial and outer minute markers.
A later leather strap has been fitted.
The watch will be sent in a new presentation box.
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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