The Vintage Wrist Watch Company has dated this piece to the 1950s.
The watch has a calibre 721 17-jewel hand-winding movement which is working nicely. The movement is signed with the Zodiac name.
The watch measures 32mm diameter excluding the winding crown and the lugs. The case is 9 carat gold and there are hallmarks inside the screw-on case back for Birmingham 1959. This is a heavy case and is the Aquatite model from the Dennison Watch Case Company, marketed at the time as a water proof case although, as with any vintage watch, it should be kept away from water and moisture.
There is a 1959 long service inscription to the back of the watch.

The lens is in good condition.
The signed dial has been professionally re-finished at some stage in its life. Original hands and seconds sweep (the movement has hacking).
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