1917 30c orange red, top margin Plate No. 6911 block of six, used Aug.21, 1923 on flown cover from New York to Los Angeles, v.f., with arrival pmk (Cat No. 516) (Image)

Est.$150

1917 2c carmine, n.h., bright color, fine, with a photocopy of a 2019 PSE certificate, cat. $900 (Cat No. 519) (Image)

Cat. $900, Est.$350

1918 $2 orange and black, top margin single, very lightly hinged, well centered, with 2019 PFC graded "VF-XF 85" (SMQ $575) (Cat No. 523) (Image)

Est.$400

1918 $5 deep green and black, used, well centered, with 2020 PSAG graded "95" (SMQ $175) (Cat No. 524) (Image)

Est.$150

1918 3c violet, right margin single, n.h., huge margins including adjoining stamps at top and bottom, with 2019 PSE certificate graded "Gem 100" (SMQ $125) (Cat No. 535) (Image)

Est.$100

1919 2c carmine rose, type II, h.r., centered to upper right, bright color, fine, with 1970 PFC (catalogue value for fine) cat. $2700 (Cat No. 539) (Image)

Cat. $2700, Est.$1,500

1922 1c green, wavy line machine cancel, usual centering with design clear of perforations, fine example of this rare Rotary Press stamp, with 2020 PFC (catalogue value for fine) cat. $3500 (Cat No. 544) (Image)

Cat. $3500, Est.$2,000

1920 $2 carmine and black, n.h., well centered, v.f., with 2019 PFC, cat. $240 (Cat No. 547) (Image)

Cat. $240, Est.$200

1920 $2 lake and black, top margin double plate number block of eight, one stamp l.h. (pos 7), balance n.h., nicely centered, fresh and v.f. A seldom seen plate block of this rarer shade, unlisted in Scott, with 2019 PSE certificate (the "regular" 547 plate block of eight catalogues $3,750) (Cat No. 547a) (Image)

Est.$3,500

1923 20c carmine rose, horizontal pair, imperf. vertically, n.h., usual centering, fine with 2001 PFC (catalogue value for fine) cat. $5000 (Cat No. 567a) (Image)

Cat. $5000, Est.$3,000

1923 2c carmine, small h.r., well centered, fresh color, with 2019 PFC graded "XF 90" (SMQ $290) (Cat No. 595) (Image)

Est.$250

1923 2c black, used, huge margins including parts of adjoining stamps on all sides, with 2008 PSE certificate graded "Gem 100J" (SMQ $150 for "100") (Cat No. 611) (Image)

Est.$100

1929 9c light rose, right margin single, n.h., well centered, with 2019 PSE certificate graded "XF-Sup 95" (SMQ $165) (Cat No. 667) (Image)

Est.$150

1929 Nebraska, 1c-10c, complete set in blocks of four, 10c hinged, others with two stamps hinged and two n.h., fine-v.f. (Cat No. 669-679) (Image)

Est.$300