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

Bulgaria

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Start price: $150

Buyer's premium:

1920, Ivan Vazov, Poet and Writer, 30st brown red and 50st dark green, two vertical pairs with perforation 11½, imperforate between stamps, full OG, NH, VF, Est. $300- $350,Scott #147-48 var