Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 370:
1974, Energy Conservation, 10c multicolored, a single with blue and red colors omitted, perfect centering, full OG, NH, VF, a common stamp is included, C.v. $400, Est. $150-$200 , Sc. #1547a
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