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

Russian Semi-Postal Issues

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Start price: $50

Buyer's premium:

1922, Rostov-on-Don issue, 2t-6t, complete set of four, no gum as produced, NH, VF, tiny expert’s hs on reverse, C.v. $109, Scott #B3-33