Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 897:
1910 (October 1), cover mailed from the board of a steamship ”Blagoveschensk – Nikolayevsk”, addressed to Switzerland, franked by 10k light blue, tied with oval steamship ds, Neuchatel ”3.XI.10” arrival marking on reverse, VF and scarce, S. Sismondo certificate, Est. $400-$500, Scott #79a
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