1853 3c red on buff, cut square, 27x30mm, just clear of indicia at bottom, tiny corner margin crease at top right, otherwise v.f., with 2009 PFC, cat. $4250 (Cat No. U6) (Image)

Cat. $4250, Est.$750

1860 10c green on buff, entire, size 7, knife 20, watermark 1 (UPSS 65), fresh color, small tear on backflap, otherwise v.f., with 2008 PFC, ex-Saddleback, cat. $3250 (Cat No. U33) (Image)

Cat. $3250, Est.$850

1874 3c green, die 58, size 10, knife 54 (UPSS 449), unused entire, with pre-printed "Holden Brothers" return address, backflap partly sealed and the entire opened at top, otherwise v.f. and rare, with 2009 PFC, cat. $4250 (Cat No. U168) (Image)

Cat. $4250, Est.$1,500

1881 3c green on blue, entire, size 10, knife 54, watermark 5 (UPSS 451), cork cancel, with "Burlington, VT Feb 24 1882" cds alongside, addressed to West Royton, MA, with preprinted address at upper left, few insignificant edge tears, otherwise v.f. and rare used entire, approximately 15 exist in addition to a known unused entire, with 2007 PFC, ex-Saddleback (where it brought $4,750 plus buyer's premium) cat. $4250 (Cat No. U170) (Image)

Cat. $4250, Est.$1,500

1884 2c red on fawn (UPSS 744) cut square, 35x36, used, fresh color, minor paper wrinkles, still v.f., one of the only 3-4 known cut squares (only used exist), with 2003 PSE certificate, cat. $25000 (Cat No. U242) (Image)

Cat. $25000, Est.$10,000

1887 1c blue on oriental buff, cut square, 31x36mm, bright color and sharp impression, v.f., one of only nine believed to exist, with 1991 PFC, cat. $10000 (Cat No. U298) (Image)

Cat. $10000, Est.$3,500

1887 1c blue on blue, cut square, 36x39mm, beautiful color, faint paper fading at top, otherwise v.f., only six cut squares are believed to exist, with 2000 PFC, cat. $12500 (Cat No. U299) (Image)

Cat. $12500, Est.$4,000

1900 Patent Reply unused post card, 1c gray blue and red, Essay, some toning, with back label detached, fine (Image)

Est.$150

1960s stamped letter sheet, 11c black, pink and violet, proposed design from a "Lettergram Priority Mail", with airplane, train and map of the United States indicia, unused with flaps glued in, v.f. and most unusual stationery essay (Image)

Est.$1,500

1965 Liberty Bell, 1 4/10c brown, large die proof on watermarked stationery paper, indicia printed diagonally in the middle, v.f. and undoubtedly rare (Cat No. U548P) (Image)

Est.$750

1970 Moby Dick, 6c blue, large die proof on watermarked stationery paper, indicia printed in the middle, v.f. and undoubtedly rare (Cat No. U554P) (Image)

Est.$750