Bidspirit auction | Soviet Union - Architectural Projects

Soviet Union - Architectural Projects Issue - 1937, Palace of the Soviets, 40k violet, vertical imperforated strip of four values, nice margins, 1mm gum scratch at the top margin, full OG, NH or LH (2), VF and very rare multiple, Raritan Stamps guarantee, C.v. $7,550++, Est. $5,000-$6,000, Scott #603b