1869, Pictorial issue, complete set of ten plate proofs on India affixed on gold-edged pages of the Postmaster General Proofs Album, pages size 185x225mm, each page has protective sleeve, album binding is damaged, proofs are practically flawless and VF, this album was presented to the 19th Century artist and engraver Rudolph Laubenheimer on behalf of the Postmaster General in 1870, C.v.  $855 for a single proof set on India, Est. $800-$1,000 (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. $350-$450 (Image)

1894, Jefferson, 50c orange, intact perforation, minor oxidation, full OG, NH and fine single, PF certificate, C.v. $1,425, Est. $300-$400 (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. $500- $600 (Image)

1909, Lincoln Birth Centenary, 2c carmine, bottom sheet margin plate No.4981 block of six with imprint, bold color, full OG, NH, F/VF, C.v. $275, Est. $120-$150 (Image)

1917, Washington, 2c rose, type I, block of four imperforated vertically, nice condition, full OG, previously hinged, VF and scarce, 100 pairs reported by Datz, PF certificate, C.v. $1,100 as two pairs, Est. $500-$600 (Image)

1919, Washington, 1c green, rotary press (coil waste) printing, plate No. 13611 block of ten (5x2) imperforated horizontally, very nice centering, full OG, pair under plate number is NH, ''side'' blocks are hinged at top, VF, C.v. $1,090 as plate block, block of four and pair, Est. $400- $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 vertical pair, Est. $400-$500 (Image)

1922, Theodore Roosevelt, large die proof on India mounted on sunken die card, proof size 73x88mm, card size 96x112mm, numbered on reverse with ''70061'', no gum as produced, VF and rare, C.v. $1,000, Est. $400- $500 (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 (Image)

1932, Washington Bicentennial, large die proof of 5c in blue, printed on India paper and mounted on sunken die card, proof size 80x95mm, card size 152x182mm, reversal number is ''70098'', fresh and VF, C.v. $1,000 (Image)

1932, Los Angeles Olympic Games, 4 black-and-white photo essays arranged on a page, approximate size 63- 67x75-77mm, Discobolus design close to the issued stamp, but with denomination of 5c, traces of previous mounts, no bends or creases, fresh condition, VF group (Image)

1943, Flag of Czechoslovakia, 5c blue violet, blue, bright red and black, double impression of the country name, full OG, NH, VF, copy of PF certificate for block of 20, C.v. $600, Est. $250-$350 (Image)

1969, definitive issue, Flag and White House, 6c dark blue, red and green, horizontal imperforated pair of coil stamps, full OG, NH, VF, C.v. $350, Est. $120-$150 (Image)

1968, Walt Disney, (6c) multicolored, bottom sheet margin single with ocher omitted (Walt Disney, 6c and etc.), full OG, NH, VF, C.v. $350, Est. $150-$200 (Image)

1969, Folklore issue, (6c) multicolored, top sheet margin single with black and Prussian blue colors omitted, full OG, NH, VF, C.v. $400, Est. $150-$200 (Image)

1969, Professional Baseball, (6c) multicolored, black (engraved) color omitted (denomination and inscriptions), top margin single, full OG, NH, VF, C.v. $500, Est. $200- $250 (Image)

1969, Christmas issue, 6c green and multicolored, horizontal imperforated pair, nice margins all around, full OG, NH, VF, C.v. $700, Est. $300-$400 (Image)

1971, Bicentennial of the American Revolution, 8c multicolored, vertical pair, top stamp has missing gray color completely and black color partially (only two splashes remained) due to a piece of extraneous paper falling into the plate during printing, full OG, NH, VF and rare, APEX and PSE certificates, C.v. $650, Est. $300-$400 (Image)

1971, John Sloan, 8c multicolored, right sheet margin horizontal pair, right stamp has red engraved color missing due to strong color misregistration (black and red engraved colors greatly shifted to the left), full OG, NH, VF and rare, C.v. $950 for stamp with missing red color only, Est. $400-$500 (Image)

1971, Emily Dickinson, 8c multicolored, a single with engraved black and olive color omitted, full OG, NH, VF, a common stamp is added for comparison, PF certificate, C.v. $500, Est. $200-$250 (Image)

1973, Progress in Electronics, 8c multicolored, right margin single with tan (background) and lilac colors omitted, full OG, NH, VF, 50 stamps exist, C.v. $600, Est. $300-$400 (Image)

1973, Progress in Electronics, (15c) multicolored, black (engraved) color omitted (all inscriptions and denomination), full OG, NH, VF, C.v. $850, Est. $350-$450 (Image)

1973, Rural America, Angus and Longhorn Cattle, 8c multicolored, a single with red brown and green (Litho) colors omitted, full OG, NH, VF, C.v. $600, Est. $200-$300 (Image)

1974, Minerals, 10k multicolored, se-tenant block of four with light blue and yellow (litho) colors omitted, full OG, NH, F/VF, C.v. $900, Est. $350-$400 (Image)