Hi, I just bought an АЧС-1 that I cannot handwind with the left button. I have an instruction booklet in Russian, I haven't been through it, but from what I understand, thevwatch is purely mechanical, and the left button is pulled for adjustment of main and sub dial, and once back in position, it should allow winding up the spring (counterclockwise), but it won't budge.
Is it an overwound spring? What do you advise?
Also how can it be dated? The dial reads 13014b