Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 635:
1887, Schooner, 10c black, right sheet margin block of four, strong color, full OG, NH, fine, C.v. $1,200, Unitrade C.v. CAD$960++, Est. $200-$300 , Sc. #59
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