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

Cat. $360, Est.US$200

1918 24c carmine rose and blue, top margin double plate number block of twelve, n.h., fine-v.f., cat. $2000 (Cat No. C3) (Image)

Cat. $2000, Est.US$700

1924 24c carmine, plate number block of six, with additional 13c plate number block of six and 75c (2) Parcel Post, used on 5c Stationery Zeppelin Round the World cover, with neat Cleveland cancels, v.f. and scarce (Cat No. C6) (Image)

Est.US$1,000

1927 20c yellow green, n.h., near perfect centering, with 2020 PSAG certificate graded "98" (SMQ $275) (Cat No. C9) (Image)

Est.US$150

1930 Zeppelin, 65c-$2.60 set of three, h.r., well centered, fine-v.f., cat. $1080 (Cat No. C13-15) (Image)

Cat. $1080, Est.US$500

1930 Zeppelin, 65c-$2.60, set of three, $2.60 with plate number at left, h.r., fine-v.f., cat. $1080 (Cat No. C13-15) (Image)

Cat. $1080, Est.US$500

1930 Zeppelin, 65c-$2.60 set of three, n.h., well centered, fresh, v.f., cat. $1675 (Cat No. C13-15) (Image)

Cat. $1675, Est.US$750

1930 Zeppelin, 65c right, $1.30 left and $2.60 bottom, set of three plate number blocks of six, n.h., nicely centered, usual natural gum wrinkles, fresh and v.f. set of Zeppelin Plate Blocks, cat. $15200 (Cat No. C13-15) (Image)

Cat. $15200, Est.US$7,500

1930 Zeppelin, $1.30 and $2.60 used together on cover, with round "This article made the complete round trip via Graf Zeppelin" cachet, also 65c vertical pair, used on card, fine-v.f. (Cat No. C13-15) (Image)

Est.US$500

1930 Zeppelin, 65c-$2.60, set of three on two FDC cards and cover ($2.60), all with April 19 cancels, $1.30 with some faded cachets, still fine-v.f., with 2021 Crowe certificates, cat. $2900 (Cat No. C13-15) (Image)

Cat. $2900, Est.US$1,000

1930 65c green, machine slogan cancel, well centered with wide margins, with 2019 PFC graded "XF-S 95" (SMQ $950) (Cat No. C13) (Image)

Est.US$500

1930 $2.60 blue, n.h., well centered, bright color, with 2020 PFC graded "VF-XF 85" (SMQ $1,000) (Cat No. C15) (Image)

Est.US$650

1930 $2.60 blue, n.h., well centered, with 2021 PFC graded "VF 80" (SMQ $800) (Cat No. C15) (Image)

Est.US$600

1930 $2.60 blue, machine slogan cancel, well centered with wide margins, with 2021 PFC graded "XF-S 95" (SMQ $1,000) (Cat No. C15) (Image)

Est.US$650

1933 50c green, lower left corner margin plate number block of eight, n.h., v.f., cat. $750 (Cat No. C18) (Image)

Cat. $750, Est.US$350

1933 50c green, ten plate number blocks of six (five different matched top and bottom "sets"), n.h., few natural gum skips, generally fine-v.f. cat. $6000 (Cat No. C18) (Image)

Cat. $6000, Est.US$2,000

2000 60c Grand Canyon, complete sheet of 20, position 1-2 and 3-4 imperf. between (C135c), pos.5-6, 7-8, 9-10, 13-14 and 17-18 imperf. vertically (C135d) and pos. 11-12, 15-16, 19-20 die cutting omitted (C135a, cat. value $1,250 each), v.f. and scarce "mixed" variety sheet, with 2002 PFC (Cat No. C135a-d) (Image)

Est.US$5,000

1930 (14 Jan) cover originating from Halifax, with Canadian 5c franking, sent via New York, where blocks of 4x5c Beacon and 10c Lindbergh were added for further passage to Uruguay, with additional departure and arrival pikes on back, fine and unusual combination franking (Image)

Est.US$150