1985, Trans-Pacific Airmail, 44c multicolored, top sheet margin imperforated vertical pair, full OG, NH, VF, C.v. $600, Est. $250-$300 (Image)

1989, 20th UPU Congress, Futuristic Mail Delivery, (45c) multicolored, bottom sheet margin se-tenant block of four with light blue (engraved) color omitted, full OG, NH, VF, C.v. $500, Est. $250-$300 (Image)

1860, Washington, 90c blue, magenta counterfeit cancellation, very light top left corner ironed crease, nevertheless nicely centered and fresh example, VF appearance, PF certificate, Est. $400-$500 (Image)

1874, Clay, 12c blackish violet, printed on horizontally ribbed paper, black grid cancel, well centered, VF, PSE certificate, C.v. $350, Est. $150-$200 (Image)

1888, Hamilton, imperforated plate proof of 30c in orange brown, bottom margin horizontal pair printed on stamp paper, tiny thins, no gum, F/VF appearance, C.v. $1,750, Est. $300-$400 (Image)

1890, Washington, imperforated plate proof of 2c in lake, block of eight (4x2) printed on stamp paper without watermark, fresh, no gum, VF appearance, C.v. $320++, Est. $100-$150 (Image)

1890, Lincoln, two imperforated pairs proofs of 4c on stamp paper, trial color proof in red brown and plate proof in dark brown, both with full OG, LH or hinged, VF, C.v. $450, Est. $250-$300 (Image)

1890, Grant, five imperforated pair proofs of 5c on wove paper, plate proof in chocolate and four trial color proofs in bister, sepia, orange brown and red brown, one pair has no gum, others with full/large part of OG, VF, C.v. for plate proof is $225, trial color proofs priced with ''-'', Est. $900-$1,000 (Image)

1890, Garfield, five trial color imperforated proofs of 6c in orange red, violet black, yellow, black brown and slate green, all are in horizontal pairs, full OG, mainly LH, VF, C.v. $1,200, Est. $500-$600 (Image)

1890, Webster, imperforated plate proof of 10c in green, horizontal pair printed on stamp paper without watermark, full OG, VLH, VF, C.v. $325, Est. $150-$200 (Image)

1890, Clay, imperforated plate proof of 15c in indigo, left sheet margin horizontal pair printed on stamp paper without watermark, full original gum with some disturbance and ink offset on reverse, VF, C.v. $625, Est. $250-$300 (Image)

1894, Jackson, large die proof of 3c in purple, triangle type I, printed on India paper and mounted on die sunk card, proof size 62x62mm, no gum as issued, fresh and VF, C.v. $750, Est. $400-$500 (Image)

1894, Lincoln, 4c dark brown, left sheet margin vertical plate No. 50 strip of three with imprint, usual rough perforation, bright color, centered to right with enormous stamp margin at left, full OG, NH or hinged (middle stamp), fine, C.v. $1,400 as singles, Est. $300-$400 (Image)

1894, Lincoln, imperforated plate proof of 4c in dark brown, horizontal pair printed on stamp paper without watermark, full OG, NH, VF and scarce, C.v. $275 as hinged, Est. $200-$240 (Image)

1895, Franklin, imperforated plate proof of 1c in blue, horizontal pair on stamp watermarked USPS paper, nice margins around, part of OG, VF, C.v. $275, Est. $100-$150 (Image)

1895, Garfield, imperforated plate proof of 6c in dull brown, horizontal pair on stamp watermarked USPS paper, full OG, previously hinged, VF, C.v. $275, Est. $100-$150 (Image)

1898, Webster, 10c brown, type I. top sheet margin with imprint and plate No.305 horizontal strip of three, full OG, left stamp is LH, two others are NH, but central one with tiny spot of gum disturbed at the bottom, fine centering, C.v. $1,225 as singles, Est. $250-$300 (Image)

1908, Washington, large die proof of 3c in deep violet, printed on India and mounted on card, size 66x87mm, no gum as produced, VF and scarce, C.v. $1,250, Est. $600-$700 (Image)

1919, Washington, 1c green on greenish paper, top sheet margin plate No.13611 block of ten (5x2) from coil waste sheet, imperforated horizontally, full OG, hinged on margin over 1st-2nd and 4th-5th stamps, pair with plate No. is NH, VF and scarce multiple, C.v. $1,090 as two blocks and a pair, Est. $500-$600 (Image)

1919, Washington, 2c carmine rose, type III, rotary press printing, top margin plate No.13740 block of six, imperforated horizontally, full OG, light trace of hinges mainly on margin, VF, C.v. $1,060 as plate block of four and pair, Est. $500-$600 (Image)

1923, Lincoln Memorial, large die proof of $1 in violet brown on wove paper, size 60x50mm, no gum as produced, VF, C.v. $700, Est. $300-$400 (Image)

1925, Monroe, 10c orange, perforation 10, block of four printed on double paper, full OG, NH (bottom stamps) or hinged, VF and very rare, Est. $150-$200 (Image)

1938, Presidential issue, Franklin, ½c deep orange, top left corner margin plate No.22471 block of 14 (7x2), two- line pre-cancel ''Mount Sterling. Ohio'', left block of 4 has inverted pre-cancel, block of 4 in the middle - upright position of pre-cancel, block of 6 at right has no pre- cancel, full OG, NH, VF and rare positional item, Est. $400-$500 (Image)

1954, Woodrow Wilson, $1 bright magenta and black, color variety, top sheet margin plate No.25025- 25027 block of four, full OG, NH, mostly VF, C.v. $400, Est. $150-$200 (Image)

1943, Flag of Czechoslovakia, 5c blue violet, blue, red and black, side margin horizontal strip of five, stamp with double impression of ''Czechoslovakia'' at right, full OG, NH, VF, a copy of PSE certificate for pane of 50, position of the strip shown, C.v. $600, Est. $250-$300 (Image)