Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 3

Soviet Union

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Start price: $5,000

Buyer's premium:

1976, Palekh Paintings, 14k multicolored, gold color (ornament and denomination) is inverted, bottom sheet margin block of four, two lower stamps without denomination, full OG, NH, VF and extremely rare major error, one of two existing blocks of four with and without denomination, as long as the only sheet of 25 with inverted gold color had been discovered, copy of the N. Mandrovski certificate for the complete sheet, Est. $8,000 -$10,000, Scott #4484 var