History of Aviation, Rare Stamps and Postal History of the World, Part 3
Lot 1098:
1919-27, two used varieties, 15sk violet of the 1st Berlin printing, watermark vertical Network, perforation 12½; and Coat of Arms 5L brown and gray with watermark vertical Webbing, both are nice and flawless, F/VF, the last one with Dr. V. Geyfman certificate, Est. $100-$150, Sc. #31a, 225 var
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