1918 6c-24c, set of three, n.h., well centered, v.f., cat. $360 (Cat No. C1-3) (Image)

Cat. $360, Est.US$150

1918 6c-24c, set of three, n.h., well centered, v.f., cat. $360 (Cat No. C1-3) (Image)

Cat. $360, Est.US$150

1918 16c green, top sheet margin plate number block of six, n.h., well centered, fresh color, v.f., with 2005 PFC, cat. $1350 (Cat No. C2) (Image)

Cat. $1350, Est.US$1,000

1923 8c-24c blocks of four, n.h., well centered, fresh color, v.f., cat. $1140 (Cat No. C4-6) (Image)

Cat. $1140, Est.US$350

1923 16c dark blue, left sheet margin plate number block of six, n.h., fresh color, fine-v.f., with 2020 PFC, cat. $2000 (Cat No. C5) (Image)

Cat. $2000, Est.US$800

1930 Zeppelin, 65c-$2.60, set of three, $2.60 with plate number at right, n.h., well centered, $1.30 with some gum wrinkles, v.f., with 2007 PSE certificate for the $2.60, cat. $1675 (Cat No. C13-15) (Image)

Cat. $1675, Est.US$750

1930 $1.30 brown, bottom margin plate number block of six, l.h., well centered, v.f., cat. $3600 (Cat No. C14) (Image)

Cat. $3600, Est.US$2,500

1930 $1.30 brown, used, well centered, with 2019 PSE certificate graded "VF-XF 85" (SMQ $475) (Cat No. C14) (Image)

Est.US$300

1933 Century of Progress, 50c green, single and vertical pair used on legal size cover from New York, Oct. 2 (First Day) to Chicago, with Oct. 26 arrival pmk (Cat No. C18) (Image)

Est.US$150

1928 Jimmy Doolittle, five flown and autographed covers addressed to Curtis Airplane Export Co., each with printed "Carried by Jimmie Doolittle, Pilot," also cachets including "First Experimental Flight Lima-La Paz", "Montevideo-Rio de Janeiro", "La Paz-Santiago", "Santiago-Buenos Aires", "Buenos Aires-Asuncion", accompanied by a letter headed Shell Petroleum Co., dated Feb 2, 1935 (Image)

Est.US$1,000

1931 small card addressed to Mrs. Alfred Lee, with an attractive airplane label, signed on reverse in pencil by Amelia Earhart, v.f. (Image)

Est.US$500