Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 3
Lot 1028:
1898, 7k blue, unused letter-sheet of series 1, printed in St. Petersburg, containing 32 various advertisements inside and on reverse, folded several times, some flaps wearing, otherwise VF, ex-Vadim Ustinovsky, Est. $300- $400
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