Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 676:
1919, black diagonal overprint ”Posta Ceskoslovenska. 1919” on Emperor Karl I stamp of 15h dull red, block of four, upper left stamp completely without overprint, while low left one has just a small part of it, full/part of OG, VF, expertized by J. Leseticky, Est. $100-$120, Scott #B7 var
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