History of Aviation, Rare Stamps and Postal History of the World, Part 1
Lot 170:
1966, 25th Anniversary of the US Savings Bonds, 5c red, dark blue, light blue and black, left sheet margin block of four, top right stamp has missing dark blue color due to foldover, full OG, NH, VF and extremely rare, Datz mentioned at lest two such errors are known, C.v. $5,000, Est. $2,500-$3,000, Sc. #1320, c
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