Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1

Afghanistan

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Start price: $250

Buyer's premium:

1907, Coat of Arms, 2ab blue, complete sheet of 18 containing three panes of six (3×2), bottom pane is placed upside down and forming three vertical gutter tete-beche pairs, no gum as issued, NH, VF, C.v. $540 for single stamps, Est. $400-$500, Scott #198, var