Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 759:
1897, Empress Dowager, the Mollendorf issue, 9c bright green, right sheet margin block of four, printed on thick paper without watermark, imperforate horizontally between stamps, perfect quality item, full original streaky gum as always exists on that issue, NH, VF and extremely rare, only another block is known, Chan #28Ma, C.v. $50,000 as two pairs (2010), Est. $20,000-$25,000, Scott #22 var
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