1971-73, Silhouette of Jet 11c carmine and Winged Envelope 13c carmine, three horizontal imperforate pairs of coil stamps, including joint line pair of 13c, full OG, NH, VF, C.v. $365, Est. $150-$180 (Image)

1989, 20th UPU Congress, Futuristic Mail Delivery, (45c) multicolored, bottom sheet margin se-tenant block of four, light blue (engraved) color omitted, full OG, NH, VF, C.v. $475, Est. $200-$250 (Image)

1898, Trans-Mississippi Exposition issue, 2c cooper red, eight horizontal top or bottom sheet margin pairs with imprint and plate No. from 616 to 742, all with full OG, NH, fine and scarce assemblage, C.v. $1,280, Est. $400-$500 (Image)

1898, Trans-Mississippi Exposition issue, 2c cooper red, top sheet margin plate No.619, block of four, nicely centered with strong color, full OG, NH, VF, C.v. $430, Est. $200-$250 (Image)

1898, Trans-Mississippi Exposition issue, 8c violet brown, top sheet margin plate No.643, block of four, beautiful color, full original but slightly disturbed gum, NH (counted as hinged), F/VF, C.v. $1,950, Est. $800-$900 (Image)

1898, Trans-Mississippi Exposition issue, 10c gray violet, bottom sheet margin plate No.620, block of four, proof- like color, full OG, top stamps are LH, bottom ones - NH, fine, C.v. $2,100, Est. $700-$800 (Image)

1901, Pan-American Exposition, 1c-10c, complete set of six, nicely centered and very fresh, full OG, NH, VF, C.v. $957, Est. $400-$450 (Image)

1901, Pan-American Exposition, Electric Automobile, 4c red brown and black, top sheet margin plate No.1145 block of six, much better centered that usually comes, full OG, NH, almost VF, C.v. $2,750, Est. $1,200-$1,500 (Image)

1909, Hudson-Fulton Celebration, 2c carmine, left sheet margin imperforate plate No.5394 block of six (2x3), minor usual waves, full OG, NH, VF, C.v. $375, Est. $150-$180 (Image)

1925, Lexington-Concord 5c blue, left sheet margin plate No.16806 block of six and Norse-American 2c carmine and black, two plate No. 16689 and 16694 arrow block of eight, full OG, mainly VF, C.v. $535, Est. $200-$250 (Image)

1923-25, Washington 2c carmine, bottom left corner sheet margin block of 24 (4x6), plate No.18208 and C.A.H. (Charles A Hall - siderographer of this issue) on the left selvage, full OG, NH, SUPERB and high potential item, Est. $200-$250 (Image)

1938 (March 27), The Macgregor Arctic Expedition Promotional postcard, ''Reindeer Point Greenland ''March 27. 1938'' violet marking, return postage paying by Admirals 4c gray, upon arrival tied by Newark ''Oct. 5.1938'' machine ds, VF, Est. $120-$150 (Image)

1938, Coolidge, $5 carmine and black, top sheet margin plate No. 22166 and 22169 central line block of four, full OG, NH, VF, C.v. $350, Est. $200-$250 (Image)

1935, Canvasbacks, $1 rose lake, top sheet margin plate No.131982 single, full OG, NH, VF, C.v. $700, Est. $300-$350 (Image)

1959, Jose de San Martin, 4c blue, horizontal pair imperforate vertically, left vertical perforation through the design as always exists, full OG, NH, VF, C.v. $750, Est. $400-$450 (Image)

1981, Washington 5c blue, re-engraved horizontal imperforate pair of coil stamps, full OG, NH, VF, C.v. $375, Est. $200-$250 (Image)

1968, Wood Ducks, 6c multicolored, vertical pair imperforate between stamps, full OG, NH, VF, Weiss certificate, C.v. $250, Est. $120-$150 (Image)

1969, Folklore issue, 6c multicolored, horizontal pair imperforate between stamps, and a single with black and Prussian green engraved color omitted, the last one with somewhat gum disturbed, otherwise fresh, full OG, NH, VF, C.v. $540, Est. $200-$250 (Image)

1972, Wildlife Conservation, 8c multicolored, complete transition pane of eight se-tenant blocks of four, black engraved color (picture, description and denomination) strongly (3-10mm) shifted to the bottom left, resulting in stamps at top four horizontal rows have doubled or omitted ''United States'' variety, full OG, NH, VF, an attractive and rare item, especially in complete pane, Est. $800-$1,000 (Image)

1973, Angus and Longhorn Cattle, 8c multicolored, green and red brown (litho) omitted, full OG, NH, VF, only 100 stamps reported, C.v. $500, Est. $250-$300 (Image)

1974, Horses Rounding Turn, 10c yellow and multi, a single with blue ''Horse Racing'' omitted, red color (US Postage 10 cents) shifted to the top, full OG, NH, VF, C.v. $500, Est. $200-$250 (Image)

1975, Paul Dunbar, 10c multicolored, left margin horizontal imperforate pair, full OG, NH, VF and rare, about 15 pairs are known, C.v. $600, Est. $300-$350 (Image)

1975, David W. Griffith, 10c multicolored, right sheet margin single with brown (engraved) color omitted, full OG, NH, VF, C.v. $250, Est. $100-$120 (Image)

1975, Space Exploration, Mariner 10, 10c multicolored, left sheet margin single with ultramarine and bister omitted, full OG, NH, VF and rare, C.v. $1,000, Est. $500-$600 (Image)

1976, American Bicentennial issue, bottom left corner margin imperforate horizontal strip of three of 13c multicolored, enlarged margins at top and on the right, full OG, NH, VF and rare, only 45 imperf strips possible, C.v. $600, Est. $300-$350 (Image)