I'm not very familiar with pocket watches and I have a nice solid 18K Remontoir which I tried to find out a bit more about but without much luck.

But I have this russian beast as well, it is manual winding with sub second at 9 o'clock. Has anybody an idea what movement it is? It is Made in CCCP so 25+ years old.
Wasn't able to find out how to open the caseback as the hinge is only for the front.