The Vintage Wrist Watch Company has dated this piece to the 1950s.
The watch has a 25-jewel automatic movement which is working nicely.
The watch measures 32.5mm diameter excluding the winding crown and the lugs. The case is gold plated. The front has the odd small mark, nothing too serious. There is some wear to the plate on the back of the watch, by the winding crown. The screw-on case back is stainless steel.

The lens is in good condition (some reflection showing in the photos).
The dial is signed Primus. It is in its original finish with original hands, seconds sweep and minute markers.
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 1950s.
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