Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1012:
2007, International Polar Year, imperforate Goznak proof of souvenir sheet containing stamps of 6r, 7r and 8r, vertical pair with gutter (21mm) and control colored lines at right, printed on chromaline card, no gum as produced, VF and very rare, Est. $800-$1,000, Scott #7021
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