For a moment I thought about a Moscva without telemeter but luckly I could get everything together again.The problem was that the glasses were loose in the gears and that the image was going up and down and back , forward and back again in the telemeters viewfinder.
A and B are decentralising glasses who turn in oposit way.They should each be in the right sprockled , but by pulling C one can disengage one gear. The big weel with the 2 screws in it will adjust lens and telemeter together.