Bidspirit auction | RSFSR Issues 1918-23

RSFSR Issues 1918-23 - 1922, offset of black diagonal surcharge 7500r on 250r violet, block of 15 (5x3) on chalk-surfaced paper, in addition a single with inverted black blue surcharge on chalky paper and vertical pair on ordinary paper bearing three black surcharges, all with full OG, block has minor foxing, NH or LH (pair), Est. $200-$250, Scott #201, b, var