Those are the Voskhod rockets, if you look closely in the right light you can see the rockets on them, label looks very faded and worn on the left one though, all voskhod rockets that i've had also carry the cccp logo.
If these are NOS they're going to need plenty of burn-in before they sound great, also they are slightly different construction, one being long silver shield and other short silver shield, shouldn't make a lot of difference but maybe a subtle one.
Give them 24 hours of pink noise and have another listen
i think i need to get myself a top quality magnifying glass for reading markings - there not NOS - guy bought a mixed bunch from russia and these were among them - will give them more time listening time though
I trust you got my PM regarding the 2 pairs of rockets i bought from you ?