1918, Curtiss Jenny, large die proof of 24c in carmine, printed on India paper and mounted on large sunken die card, size of proof is 87x75mm, size of card 202x150mm, excellent condition, no gum as produced, VF and rare, C.v. $4,750, Est. $2,200-$2,400 (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. $150-$200 (Image)

1991, Harriet Quimby, 50c multicolored, left sheet margin USPS block of four, imperforated horizontally, perfect condition, full OG, NH, VF and scarce, C.v. $1,800 as two pairs, Est. $700-$800 (Image)

12 Mostly Pioneer Flights Items 1927-82, ''Lindbergh Celebration'' St. Louis-Chicago, cover delivered by S.S. Aquitania for Flight London-Munich-Berlin-Vienna of 1928, cover from Boston with portion delivery from Galway to London of 1929 and etc., mainly fresh and flawless, F/VF, Est. $150-$200 (Image)