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Air Post stamps 1947-54, Swallows, strongly shifted to the bottom black two-line overprint "A.M.G. F.T.T." on 5L dark green, in addition Airplane with black straight line overprint "AMG-FTT" on 50L violet, watermark"winged wheel" type III, full OG, NH or LH respectively, VF, first one expertized by R. Mondolfo and others, Sassone #3 var, 22A
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