The Vintage Wrist Watch Company has dated this piece to the 1910s.
The watch measures 34.5mm diameter excluding the later winding crown and the wire lugs. The case is silver and it is hallmarked inside the screw-on case back for London (import mark), 1918 with a sponsor’s mark for Arthur Rendell.

In 1907, an act came into force which meant that all imported watches had to be assayed in a UK assay office and marked with British import hallmarks. For this, a sponsor's mark was required. In this particular case, Arthur Rendell was an employee, and probably in charge, of the department that handled imported watches at a company called Pringles, the UK's largest wholesalers of jewellery, silverware, clocks and watches, so it was deemed relevant to use his initials.

The inside of the case back also has the brevet (patent) number 71602 which relates a 1916 patent for the construction of a dustproof case.
The bezel is also screw fitting.
The case is in good condition for such an early piece, just some unevenness to the case back but not too detrimental.
The acrylic lens has light scratching.
The dial has quite a few hairlines but they are faint.
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 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