I was unaware such a replica had been made in Russia, but if it has I'd be deeply suspicious. The "O" replicas that Leitz made have a completely different mechanism than the later production cameras -- a non-capping shutter, a shutter speed dial that works on the shutter opening instead of speeds, and a very different way of working. You have to cap the lens while winding, you can only set the shutter speed after the camera is wound (I think, maybe before) and there are other oddities I forget.
One could, I suppose, modify a Russian camera to look like an "O" Leica, but not the mechanism. That would mean a cosmetic copy, but not a real copy.
You could, of course, buy the real thing. Not cheap. They are also rather tedious to use, but that never stopped this crowd.