Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 802:
1971, Butterflies, imperforated multicolored proof of 15c in left sheet margin block of four, control lights on selvage, prepared for Federated States with no portrait and Coat of Arms, full OG, NH, VF, Est. $150-$200
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