The Vintage Wrist Watch Company has dated this piece to the 1910s.
The watch has a Swiss hand-winding movement, probably by A Schild, which is working nicely.
The watch measures 33mm diameter excluding the winding crown and the fixed wire lugs.

From 1 June 1907, Stockwells acted as assay agents, facilitating the import into Britain of foreign gold and silver items which had to be assayed and hallmarked in a UK assay office before being released for retail.

The case is in lovely condition, just a little unevenness to the hinged case back.
The acrylic lens is in good condition.
The dial has four hairlines but they are faint.
A later leather strap has been fitted.
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