Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 170:
1972, Wildlife Conservation, 8c multicolored, complete transition pane of eight se-tenant blocks of four, black engraved color (picture, description and denomination) strongly (3-10mm) shifted to the bottom left, resulting in stamps at top four horizontal rows have doubled or omitted ”United States” variety, full OG, NH, VF, an attractive and rare item, especially in complete pane, Est. $1,000-$1,200, Scott #1467a var
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