Earlier and later watch models feature different back covers. Height - 4.2 mm. The watch has an improved block of a quartz generator, which allows saving energy of the power source during long-term storage, for which you should put the watch's head in the position of the hands translation. An interesting and rare specimen.
The first batch was made in 1974. Mass production began in 1977.The main feature of an electromechanical watch is a balance motor driven by pulses synchronized by a quartz resonator. In fact, this is mechanics, on the contrary, the torque in the movement appears in balance due to electrical impulses in the coil and is transmitted to the hands. Therefore, the watch has preserved the classic "ticking" for mechanical watches.
This is the first and last Soviet watch with a similar movement. This movement was not developed further due to its complexity. Therefore, subsequently, quartz watches began to be made with the now familiar and simpler movements. With pleasure I will answer any questions and make additional photos.I'll be glad to see everyone again. You are waiting for watches, as well as collectible and vintage items of the Soviet era. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Watches\Wristwatches".
The seller is "antiqussr" and is located in this country: UA. This item can be shipped worldwide.