Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1060:
Description
1897, Curls with Diametric Line inside, 3k black on grayish blue paper, vertical tete-beche pair of types 6/5, perf reinforcement, which is apparently not necessary, large part of OG, VF, C.v. $800, Est. $400-$500 , Schmidt #23S
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