1958 entire envelope, proof of the red "2 cents" surcharge only, v.f. (Cat No. U537P) (Image)

Est.$600

1958 3c dark violet + 1c green, surcharge essay entire, legal size with Plane, Train & Ship surcharge essay without denomination or "U.S. Postage" label, black "Canceled" overprint, v.f., unlisted (Cat No. U540E) (Image)

Est.$750

1962 entire envelope, essay of the green surcharge only, type I, "U.S. Postage" completely different typeface and 19 1/2mm long, Eagle with neck and head feathers (instead of bald spot), also with four front and rear claws (instead of three) (Cat No. U545E) (Image)

Est.$600

1962 entire envelope, essay of the green surcharge only, type II, "U.S. Postage" 19 1/2mm long, normal adhesive toning, v.f. (Cat No. U545E) (Image)

Est.$600

1965 1 4/10c brown, proof sheet containing the Liberty Bell indicia, fresh and v.f. (Cat No. U548P) (Image)

Est.$750

1949 4c deep red, unused postal card, v.f., with regular 4c red orange included for comparison, cat. $500 (Cat No. UXC1a) (Image)

Cat. $500, Est.$150

1958 entire envelope, pre-printed "United States Air Mail Postage 6c", fully imprinted inside (mirror image) in violet, unused, v.f. (Cat No. UC25E) (Image)

Est.$450

1958 6c+1c green, surcharge essays, two 6c red entire envelopes (normal and legal size), with red and blue borders, each with Plane, Train & Ship surcharge essay without denomination and "U.S. Postage" label, both with black "Canceled" overprint, v.f. (Cat No. UC30E) (Image)

Est.$2,000