1928, Beacon at Rocky Mountains, 5c carmine and blue, perfectly centered with intact perforation, full OG, NH, Superb 98, according to PSE certificate, SMQ C.v. $550, Est. $150-$200 (Image)

Early Premium Centering Airmails with Certificates: 1926- 31, Map, ''Spirit of St. Louis'' and Winged Globe, six stamps, better graded XF 90J (2), VF-XF 85 (1) in new PSE certificates, all with full OG, NH or VLH (1) (website photo) (Image)

1938, Eagle Holding Shield, 6c dark blue and carmine, vertical pair imperforated horizontally, full OG, LH, VF, penciled position numbers 34/39 are on reverse, C.v. $300, Est. $150-$200 (Image)

1973, Progress in Electronics, 11c multicolored, olive green color omitted, very light impression of vermilion frame is presented, full OG, NH, VF, APEX certificate, C.v. $1,000, Est. $400-$500 (Image)

1980, Blanche Stuart Scott, 28c multicolored, left sheet margin plate No.39542 horizontal imperforated pair, full OG, NH, VF and rare, C.v. $2,000, Est. $800-$1,200 (Image)

1985, Junipero Serra, 44c multicolored, top margin vertical imperforated pair, full OG, NH, VF and scarce, C.v. $900, Est. $400-$600 (Image)

1989, 20th UPU Congress, Futuristic Mail Delivery, (45c) multicolored, bottom sheet margin (USPS) se-tenant block of four with light blue (engraved) color omitted (country name and denomination), full OG, NH, VF, C.v. $500, Est. $200-$250 (Image)

1991, Harriet Quimby, 50c multicolored, left sheet margin USPS block of four, imperforated horizontally, perfect condition, full OG, NH, VF and scarce, especially in block, C.v. $1,700 as two pairs, Est. $750-$1,000 (Image)