Bidspirit auction | Soviet Union

Soviet Union - 1929, Pioneers' Assembly, 10k olive brown and 14k gray blue, complete set of two, each stamp with a part of perfin ''Obrazets'', nice and fresh, full OG, LH, VF and rare, only a few complete sets known, ex-Vadim Ustinovsky, Est. $300-$350 , Scott #411-12