1928, Beacon at Rocky Mountains, 5c carmine and blue, perfectly centered with intact perforation, full OG, NH, Superb 98, according to PSE certificate, SMQ C.v. $550, Est. $150-$200 (Image)

Early Premium Centering Airmails with Certificates: 1926- 31, Map, ''Spirit of St. Louis'' and Winged Globe, six stamps, better graded XF 90J (2), VF-XF 85 (1) in new PSE certificates, all with full OG, NH or VLH (1) (website photo) (Image)

1938, Eagle Holding Shield, 6c dark blue and carmine, vertical pair imperforated horizontally, full OG, LH, VF, penciled position numbers 34/39 are on reverse, C.v. $300, Est. $150-$200 (Image)

1973, Progress in Electronics, 11c multicolored, olive green color omitted, very light impression of vermilion frame is presented, full OG, NH, VF, APEX certificate, C.v. $1,000, Est. $400-$500 (Image)

1980, Blanche Stuart Scott, 28c multicolored, left sheet margin plate No.39542 horizontal imperforated pair, full OG, NH, VF and rare, C.v. $2,000, Est. $800-$1,200 (Image)

1985, Junipero Serra, 44c multicolored, top margin vertical imperforated pair, full OG, NH, VF and scarce, C.v. $900, Est. $400-$600 (Image)

1989, 20th UPU Congress, Futuristic Mail Delivery, (45c) multicolored, bottom sheet margin (USPS) se-tenant block of four with light blue (engraved) color omitted (country name and denomination), full OG, NH, VF, C.v. $500, Est. $200-$250 (Image)

1991, Harriet Quimby, 50c multicolored, left sheet margin USPS block of four, imperforated horizontally, perfect condition, full OG, NH, VF and scarce, especially in block, C.v. $1,700 as two pairs, Est. $750-$1,000 (Image)

1979-98, nine items, including four imperforated errors and five omitted colors, individually priced from $45 to $200, nice quality unit, full OG, NH, VF, C.v. $840, Est. $300-$400 (website photo) (Image)

1983, US Emblem 20c red, blue and black, horizontal imperforated pair of coil stamps, full OG, NH, VF and scarce, C.v. $1,000, Est. $400-$500 (Image)

1988, US Emblem 25c red, blue and black, horizontal imperforated pair of coil stamps, full OG, NH, VF and scarce, C.v. $800, Datz C.v. $1,000, Est. $350-$450 (Image)

1879, Numeral 1c in black, trial color imperforated proof printed directly on card, block of four, no gum as produced, VF, C.v. $200++, Est. $100-$120 (Image)

1879, Numeral 2c in blue green, large die proof on India paper mounted on card, ''C23A'' inscription at top, slight facial wrinkle at right, still fresh and VF, C.v. $500, Est. $150-$200 (Image)

1891, Numerals 50c bright claret, horizontal imperforated pair proofs on stamp paper, nice margins all around, full OG, NH but with slight gum creases, VF appearance, C.v. $500, Est. $120-$150 (Image)

1894, Numerals 10c and 50c, two large die proofs on India paper in bright claret, first one is fitted to stamp size, the other one is sunken die, both mounted on large cards with approximate size of 148x200mm, fresh quality overall, VF, C.v. $330, Est. $150-$200 (Image)

1922, black surcharge ''Shanghai. 4cts. China'' on 2c carmine, top sheet margin block of eight with straight edge and part of arrow at left, post office fresh quality, full OG (margin mainly w/o gum), NH, fine, C.v. $1,680 as single stamps, Est. $400-$500 (Image)

1914, Messenger on Bicycle, 10c pale ultramarine, nice margins and perfect centering, full OG, NH, XF-Sup95, according to PSE certificate, C.v. $425 (SMQ C.v. $1,100) (Image)

1988, Grosbeak and Owl, 25c+25c multicolored, complete $5.00 booklet of two panes of ten, each pane contains five horizontal se-tenant pairs, all stamps have strong misregistration of offset colors (except light blue background), appearing as double impression, fresh, VF and a spectacular item, Est. $150- $200 (Image)

1990, Love, 25c multicolored, complete $5.00 stamp booklet, containing two panes of ten values, top pane has bright pink omitted, nice and fresh, VF, 20 error panes exist, C.v. $950, Est. $400- $500 (Image)

1990, Lighthouses, 25c x5 multicolored, complete $5.00 stamp booklet containing four se-tenant strips of five values with white color omitted (USA 25), fresh and VF, C.v. $350, Est. $150-$200 (Image)

1991, Pine Cone, 29c multicolored, complete $5.22 booklet pane of 18 with die cutting omitted between middle and right vertical rows of the booklet, forming six horizontal pairs imperforated between stamps, booklet cover is intact and unfolded, fresh and VF, C.v. $1,050 as six pairs, Est. $400-$500 (Image)

1988, Buffalo and Prairie, stationery postcard 15c multicolored, printed on both sides, fresh, unused and VF, C.v. $350, Est. $150-$200 (Image)

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)