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

Austria

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Start price: $150

Buyer's premium:

1962, the Beethoven House, 2.20s green, right sheet margin block of four, imperforate vertically and horizontally between stamps, perforated 13¾ at top and bottom only, full OG, NH, VF and scarce multiple, not listed in the ANK Cat., Est. $300-$400, Scott #697 var