The Vintage Wrist Watch Company has dated this 1950s Automatic Wrist Watch to the 1950s.
Early automatic watches had been powered with bumper movements. Rolex subsequently developed a full rotor system where the rotor moved in one direction - this movement was protected by a patent. Felsa subsequently developed an automatic movement where the rotor moved in both directions and this bi-directional was duly named the Bidynator.

The watch measures 32mm diameter excluding the winding crown and the lugs. The case has a handsome chunkiness to it, it is stainless steel and it is in lovely condition. The screw-on case back states that the watch is waterproof but, as with any vintage watch, it should be kept away from water and moisture.

The lens is in very nice condition.
The is signed Primula, a name first registered by the Buses family of Berlin in 1910, and then again in 1950 by Gerhard Buses of Harrow, Middlesex. Buses was an importer of watches into the UK. The dial is in its original finish with original hands and a subsidiary seconds dial. A little marking to the dial but not too detrimental.
A new leather strap has been fitted.
The watch comes in a new presentation box.
The Vintage Wrist Watch Company has dated this 1950s Automatic Wrist Watch 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