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

Russian Semi-Postal Issues

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Start price: $150

Buyer's premium:

1929, Child Welfare, 10+2k olive brown and orange brown, perforation L12½, bottom sheet margin single with missing ”+2k” on the right value tablet and broken text at the top and bottom due to strong overinking, full OG, LH, VF, rare and spectacular error, Est. $300-$400, Scott #B54 var