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 rotor is signed with the name Bidynator.

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 33mm diameter excluding the winding crown an the lugs. The case is gold plated and is in good condition, just some wear behind the winding crown on the back of the watch. The screw-on case back is signed and it also states that the case is waterproof but, as with any vintage watch, it should be kept away from water.

The lens is in good condition.
The signed dial is in good original condition with original hands, centre seconds hand and
date (adjusted by turning the hands forwards).
A new leather strap has been fitted.
The watch will be sent in a new presentation box.
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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