Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2

Soviet Union of 1941-91

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Start price: $100

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1956, Rostov Machinery Works, 40k multicolored, side margin block of 12 (6×2), stamps at the bottom row with ”broken balcony”, in addition second stamp from the left with ”shrub” variety (position 38), full OG, NH, VF, Est. $200-$250,Scott #1836, var