1988, Igor Sikorsky, (36c) multicolored, red, dark blue and black (engraved) omitted, full OG, NH, VF and rare, a copy of PSE certificate for block of four, this one was the bottom left stamp, a common stamp is included, C.v. $1,900 (Image)

Swarts' City Dispatch Post, New York, N.Y.. 1849, Zachary Taylor, (2c) red, complete sheet of 25, stone IV, fresh quality, full OG, NH, VF, PF certificate, C.v. $600 as hinged (Image)

1919-22, black or red surcharges on definitive issue of 1917-19, 2c/1c-$2/$1 and 2c/1c- 4c/2c, two complete sets, the total is 18 values, stamp of 16c has a part of skipped gum at the bottom, $1 has rounded top left corner and insignificantly toned paper at the top, overall fresh quality unit, full OG, NH or VLH ($2 stamp), mainly fine, PSE certificates for $1 and $2, C.v. $4,400 (Image)

1917, Washington, 5c rose, perforation 11, vertical pair of errors in block of 12, natural straight edge at the bottom, upper left stamp has tiny natural paper inclusion, nice centering, full OG, NH, mostly VF, C.v. $1,850++ (Image)

1923, Monroe, 10c orange, vertical pair imperforated horizontally with straight edge on the left, guidelines at left and bottom (positions 81/91), nice margins and strong color, full OG, LH, VF and rare, according to Datz only one pane was discovered, all centered to the right, PF certificate, C.v. $2,000 (Image)

1923, Monroe, 10c orange, imperforated block of four, intense color and full margins all around, no gum as always exists, NH, VF and very rare, most of these imperforated stamps received blue crayon invalidating lines, C.v. $6,250 (Image)

1928, Washington, 2c carmine, type II, rotary press printing, perforation 11x10½, nice centering, full OG, NH, VF, PF certificate, C.v. $600 (Image)

1938, Presidential issue, $1, $2 and $5, three high values in center line blocks of four, perfect centering, full OG, NH, VF, C.v. $460 (Image)

1938, Presidential issue, Wilson, $1 purple and black, top sheet margin plate No.24496 and 24478 block of four, wide and balanced margins, mathematically well centered, full OG, NH, XF, PSE certificate, Superb 98, plate blocks not priced in SMQ (Image)

1975, Bicentennial of US Postal Service, (10c) multicolored, se-tenant block of four with red color (value) omitted, minor perf separation on the right, otherwise full OG, NH, VF and very rare, according to Datz only 6-8 blocks are known, not priced either in Scott or Datz Cat. (Image)

1982, Library of Congress, 20c red and black, three side margin block of 20 (2x10) with strongly misplaced horizontal perforation, resulting in parts of stamps appearing at the top and bottom margins, full OG, NH, VF (Image)

1996, Atlanta Summer Olympic Games, 32c multicolored, imperforated se-tenant pane of 20, full OG, NH, VF, C.v. $750 (Image)

1999, Daffy Duck, 33c multicolored, complete pane of ten self-adhesive stamps, vertical die cutting is intact, but almost invisible in the middle (second horizontal row), while horizontal die cutting slightly visible at the top and bottom only, backing paper is intact, NH, VF, in our opinion the item is imperforated horizontally between stamps, however according to PF certificate it has only unique vertical pair (position 6-9) imperforated horizontally between stamps, C.v. $4,250++ (Image)

2016, Love, (49c) multicolored, self-adhesive stamp with die cutting omitted, three-side margin plate No.B11111 block of ten (bottom part of a pane of 20), backing paper intact, VF, prorated C.v. $250 (Image)