Unnumbered 98ks are rare, but not unheard of and appearently exist from all the makers.
I have a ce 44 that is a totaly unnumbered rifle and it has all correctly/matching proofed parts to the rec. I also have a bcd 41 that is an RC. This one is a Germanicon rebarrel - .02 on bbl collar. The only ser nr on the bbl/rec is one on top of the bbl along with the RC X. The Germans missed 2 chances to put a ser nr on this one - at the factory and at the depot so the ruskies put a 2 diget one on it.
I have also heard of a ce 44, but haven't seen it.
I'd like to find an unnumbered bnz or ar.
Sarge