Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 1069:
1940-43, Triangle Fieldpost Letter Seal, no value indicated in red and blue, either in Dutch or English, 4 perforated (one tete-beche pair), 17 imperforated including 5 singles (one-used), tete-beche pair with double blue color and two blocks of 4 or 6, full OG, NH, VF, Est. $150-$200
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