Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 30:
1979, Wiley Post, 25c multicolored, top right corner margin (ZIP) vertical se-tenant pair with black and blue engraved colors strongly shifted, 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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