Bidspirit auction | Soviet Union - Issues of

Soviet Union - Issues of 1955-1957 - 1957, Alexei N. Bach, Russian Biochemist, 40k ultra, brown and buff, perforation L12 1/2 instead of comb 12x12 1/2, unfolded block of four, full OG, NH, VF, Est. $120-$150, Scott #1930 var