Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1

Azerbaijan

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Start price: $100

Buyer's premium:

1919-22, two imperforate sheet margin blocks of four, National issue, 20k multicolored with black color printed on the back; Soviet issue, 1000r dark blue and rose with rose color strongly shifted to the bottom, no gum as issued, NH, VF, Est. $200-$300, Scott #2, 26 var