At last ! I have bought just now the genuine russian diver's Zlatoust 191 Chs, produced in March 1977. The watch is in excelent condition, practically near mint. The case and the dial are perfect, the screws which fasten the dial are untouched, the screwdriver slots are still "virgin". It's from one side very good - the watches are unopened by barbarian "watchmakers", from other side the watch needs a some service and oiling.
I'm not sure if I keep this monster for myself or it will be exchanged to other diver's watches (more "user friendly")