Gents 1950s Primula automatic wrist watch.The watch has a good quality 18-jewel Felsa 410 automatic Bidynator movement which is working nicely. 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. Buse...