Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 235:
1922-23, regular issue, 11c, 12c, 14c and 15c, perforation 11, set of 4 values in top or bottom sheet margin plate No. blocks of six, full OG, NH or LH (one stamp of 15c), VF, C.v. $625, Est. $250-$300, Sc. # 563-66
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