History of Aviation, Rare Stamps and Postal History of the World, Part 1
Lot 310:
1914, Kookaburra, 6p lake brown, top right corner sheet margin block of four with double vertical perforation between stamp and selvage, full OG, NH (strengthened perforation at margin only), VF, C.v. $640++,SG #19, £300 as hinged singles, Est. $250-$300, Sc. #18
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