Air Post stamps. 1938, Eagle Holding Shield, 6c dark blue and carmine, center line vertical pair imperforated horizontally, nice offset on reverse, full OG, NH, VF, C.v. $300++, Est. $200-$240 (Image)

Air Post stamps. 1976, Plane, Globes and Flag, (31c), supposes to be in red blue and black, all colors omitted, bottom right corner sheet margin block of four, top right stamp with pencil shading, full OG, NH, VF and scarce multiple, PSE certificate, Est. $250-$300 (Image)

Air Post stamps. 1978, Wright Brothers, 31c+31c multi, block of four vertical se-tenant pairs and extra pair of No.C92, six stamps in the middle with black instead of blue inscription (US Airmail 31c) at bottom, full OG with minor disturbance on top pair, NH, VF and rare, Est. $500-$600 (Image)

Air Post stamps. 1978, Wright Brothers, 31c+31c multi, top margin block of four vertical se-tenant pairs with very light printing of blue, yellow and magenta offset colors, full OG, NH, VF, Est. $150-$200 (Image)

Air Post stamps. 1983, Los Angeles Olympic Games, 40c multicolored, right sheet margin imperforate se-tenant block of four, full OG, NH, VF, C.v. $650 (Image)

Air Post stamps. 1985, Trans-Pacific Air Mail, 44c multicolored, top margin vertical imperforate pair, full OG, NH, VF, C.v. $550 (Image)

Air Post stamps. 1989, 20th UPU Congress, Futuristic Mail Delivery, 45c multicolored, bottom right margin ZIP se-tenant block of four, light blue (engraved) color omitted, full OG, NH, VF, C.v. $500 (Image)

Air Post stamps. 1991, Harriet Quimby, 50c multicolored, left sheet imprint margin vertical pair imperforate horizontally, full OG, NH, VF, C.v. $800 (Image)