The Vintage Wrist Watch Company has dated this piece to the 1940s.
The movement is stamped Made in England. It appears that the balance has been replaced at some stage in its life, although it is the correct balance for the movement.

The watch measures 31mm diameter excluding the winding crown and the lugs. The case is in good condition for its age with just general light surface marks, nothing serious at all.
The lens is in good condition.
The dial is signed Smiths, Made in England. There are minor marks but it is very acceptable for a 1940s piece. The minute hand is a later replacement.
A new black leather strap has been fitted.
The Vintage Wrist Watch Company has dated this piece to the 1940s.
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