History of Aviation, Rare Stamps and Postal History of the World, Part 1
Lot 275:
1979, Wiley Post, 25c multicolored, top right corner margin (ZIP) vertical se-tenant pair with black and blue engraved colors strongly shifted to the bottom, resulting in upper stamp has no denomination, while lower one has ”US Airmail 25c” at top instead of bottom, full OG, NH, VF and a spectacular error, a common pair is included, Est. $100-$150, Sc. #C96a var
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