History of Aviation, Rare Stamps and Postal History of the World, Part 3
Lot 1067:
1915, Prince Johann, 5h yellow green, 10h deep rose and 25h blue, complete set of three printed on ordinary paper, fresh colors, full OG, NH, mostly VF, E. Diena certificate, C.v. $2,500, SBK #1y-3y, CHF4,000, Est. $900-$1,200 , Sc. #1a-3a
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