History of Aviation, Rare Stamps and Postal History of the World, Part 1
Lot 178:
1971, US Space Achievements, 8c x3 multicolored, left margin block of nine, containing three horizontal se- tenant strips of three of No.1435-1434-1435, central stamp of the block (No.1434) has red color (stripes of the Flag) omitted, full OG, NH, VF and extremely rare, this error is not listed either in Scott or Datz, APEX certificate, Est. $1,500-$2,000, Sc. #1435b var
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