1861 double rate cover sent to Boston, with "Harper, Liberia" handstamp with manuscript "Paid" inserted, endorsed "Per Str via England", with "Paid Liverpool Br. Packet 4 13.3." cds, red crayon "32" and "10" handstamp, with Boston arrival on reverse, v.f. and rare pre-philatelic cover from Liberia, ex-Sacher (Image)

Est.$1,000

1861 cover sent to Boston, with "Harper, Liberia" handstamp with manuscript "Paid" inserted, endorsed "Per Str via England", with "Paid Liverpool Br. Packet 4 13.3." cds, red crayon "16" and "5" handstamp, with Boston arrival on reverse, backflap faults, still v.f. and rare pre-philatelic cover from Liberia, ex-Sacher (Image)

Est.$1,000

1938 Issue complete, with additional shade of 4c (yellow), imperforate pairs, each stamp overprinted "Proof", mostly n.h., v.f., scarce set (Cat No. C4-13P) (Image)

Est.$500

1941 First Direct Flight to New York, 50c surcharges, also $1 complete set of 10, each tied by February 14, 1942 (First Day of Issue) pmk on separate covers flown from Monrovia to New York, fine-v.f., some backstamped, few with some adhesive address label toning, mostly fine-v.f., signed Irwin Heiman, Stolow, etc. The flight, originally planned for 1941, was postponed due to wartime conditions. A rare complete set of covers, ex-Gilbert (Cat No. C17-26) (Image)

Est.$2,500

1941 50c on 1c green, 50c on 20c magenta, n.h., v.f., signed Calves, etc., only 42 of each printed, considerably undercatalogued, cat. $5500 (Cat No. C17,23) (Image)

Cat. $5500, Est.$5,000

1921 10c Monrovia and 10c Robertsport, set of two imperf. sheet margin pairs, without gum as issued, v.f., cat. $450 (Cat No. F23-24a) (Image)

Cat. $450, Est.$200

1921 10c Monrovia and 10c Robertsport, set of two imperf. sheet margin pairs, without gum as issued, v.f., cat. $450 (Cat No. F23-24a) (Image)

Cat. $450, Est.$200