The Vintage Wrist Watch Company has dated this piece to the 1960s.
In the photo, you will see a couple of empty retaining screw holes. These screws are not required as the movement is held in place by the specially shaped and fitted case.

The watch measures 34mm diameter excluding the winding crown and the lugs. The case is 9 carat gold and there are hallmarks inside the case back for London 1965 together with the mark for Sylvain Dreyfuss.

Rotary Watches Ltd was established at La Chaux-de-Fonds, Switzerland, by Moise Dreyfuss in 1895. By the 1920s family members Georges and Sylvain Dreyfuss began importing Rotary watches to Britain, which was to become the company's most successful market.

The case is in good condition, as is the lens which just has one short faint scratch.
The dial is in good original condition with original hands, seconds sweep and cross hair detailing.
A new leather strap has been fitted.
The watch comes in a later Rotary presentation box.
The Vintage Wrist Watch Company has dated this piece to the 1960s.
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