Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1056:
1883, Annual Subscription, no value indicated, light yellow brown, printed on vertically laid paper (!), bottom sheet margin single, full OG, previously hinged, VF and until now the only known stamp printed on watermarked paper, Schmidt #6 var, Chuchin #2b var, Large Zemstvo Cat. #6P, C.v. $25,000, Est. $6,000-$7,000
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