Bidspirit auction | RSFSR Issues 1918-23

RSFSR Issues 1918-23 - 1922, triple black (one inverted) diagonal surcharge 7500r on 250r violet, block of four printed on ordinary paper, one normal surcharge of light impression appears to be brown, full OG, NH, VF, I. Kirzhner certificate, Est. $400-$500 , Sc. #201 var