Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1097:
1943, Tehran Conference, 3r indigo, red and blue, top right corner sheet margin transition block of 12 (2×6) with blue color strongly shifted to the right on direction from bottom to top, representing six normal stamps at bottom and six at top with shift of blue of various degree, which is about 2mm on top block of four, full OG, NH, VF and a spectacular piece, Scott #908, var
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