Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Lot 1535:
COLLECTION: 1918, 68 perforated and imperforated items bearing various trident overprints, including marginal singles, strips and blocks, each one representing control numbers on selvages, including some better items, nice condition overall, full OG, mainly NH, VF, Est. $600-$800
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