Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 506:
1922, black surcharge (type III, elongated figure) 1(k) on 1st Constantinople imperforated stamp of 1r gray green, bottom margin block of four, no gum as produced (probably proof), NH, VF and very rare multiple, Artar #716, C.v. $680++, Est. $400-$500, Scott #360 var
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