Proprietary, 1874, 2¢ green & black, green paper, center inverted (Scott RB2d), fresh and nicely centered, canceled with a single pen stroke, Fine to Very Fine, with a 2016 P.F. certificate.

Only about 15 examples are recorded — virtually all centered similarly to this one — and very few of them are sound.
Scott $8,000
Estimate $5,000-7,500 (Image)

Scott $8,000
Estimate $5,000-7,50

Sale No: 757
Lot No:971
Symbol:Cat No:RB3b

Proprietary, 1874, 3¢ green & black, green paper (Scott RB3b), a fresh, mint block of 4, o.g., lightly hinged; light vertical crease through the left stamps, otherwise Fine to Very Fine.
Scott $325
Estimate $200-300 (Image)

Scott $325
Estimate $200-300

Sale No: 757
Lot No:972
Symbol:Cat No:RB5a

Proprietary, 1871, 5¢ green & black, violet paper (Scott RB5a), a marvelous mint example, o.g., lightly hinged, incredibly fresh and virtually perfectly centered, Extremely Fine.
Scott $175 for used
Estimate $300-400 (Image)

Scott $175 for used
Estimate $300

Sale No: 757
Lot No:973
Symbol:oCat No:RB5b

Proprietary, 1874, 5¢ green & black, green paper (Scott RB5b), a lightly canceled block of 4, exceptionally fresh and bright; small thin spots, Fine appearance. The only multiple larger than a pair recorded in the Curtis census., Ex-Joyce, Curtis.
Scott $525
Estimate $500-750 (Image)

Scott $525
Estimate $500-750

Sale No: 757
Lot No:974
Symbol:Cat No:RB6b

Proprietary, 1874, 6¢ green & black, green paper (Scott RB6b), o.g., penciled number on gum, exceptionally fresh, Fine to Very Fine.
Scott $140 for used
Estimate $150-200 (Image)

Scott $140 for used
Estimate $150

Sale No: 757
Lot No:975
Symbol:(Cat No:RB7a

Proprietary, 1873, 10¢ green & black, violet paper (Scott RB7a), unused without gum, fresh, Fine to Very Fine.
Scott $300 for used
Estimate $300-400 (Image)

Scott $300 for used
Estimate $300

Sale No: 757
Lot No:976
Symbol:(Cat No:RB8a

Proprietary, 1873, 50¢ green & black, violet paper (Scott RB8a), an extraordinary unused example (without gum), exceptionally fresh and quite well-centered with a razor-sharp impression including a strong vignette, Very Fine.

A very rare stamp in unused condition — the Philatelic Foundation has certified only a single example.
Scott $1,000 for used
Estimate $1,500-2,000 (Image)

Scott $1,000 for used
Estimate $1

Proprietary, 1873, 50¢ green & black, violet paper (Scott RB8a), nicely centered with a neat blue handstamped cancel, Nov 19, 1880; small repair in lower right margin and small thin at the top, Very Fine appearance, with a 2011 P.S.A.G. certificate.
Scott $1,000
Estimate $300-400 (Image)

Scott $1,000
Estimate $300-400

Proprietary, 1874, 50¢ green & black, green paper (Scott RB8b), exceptionally fresh and nicely centered with a neat blue Starkey & Palen, Philadelphia handstamped cancel, Apr 30, 1881; tiny hinge thin, Very Fine appearance, with a 2020 P.S.E. certificate.
Scott $850
Estimate $300-400 (Image)

Scott $850
Estimate $300-400

Proprietary, 1874, 50¢ green & black, green paper (Scott RB8b), exceptionally well-centered with a neat blue handstamped cancel; light vertical and horizontal creases and slightly rounded lower left corner, otherwise Very Fine and quite attractive.
Scott $850
Estimate $300-400 (Image)

Scott $850
Estimate $300-400

Proprietary, 1873, $1 green & black, violet paper (Scott RB9a), fresh and exceptionally well-centered with a neat violet oval handstamped cancel of shipping & commission merchants "J.M. Huntington & Co., Norwich, Ct., Jan 24 1879"; faint pressed horizontal document crease, two small, light corner creases at the upper left and tiny thin at the bottom; choice, lovely Extremely Fine appearance.

A lovely example of this rare stamp that, had it been sound, would certainly be among the finest examples extant.
Scott $3,500
Estimate $2,500-3,500 (Image)

Scott $3,500
Estimate $2,500-3,50

Sale No: 757
Lot No:981
Symbol:(Cat No:RB9b

Proprietary, 1874, $1 green & black, green paper (Scott RB9b), unused without gum, a stunning paper variety, cleanly printed with nice registration of colors, plus four clear margins; creases (per certificate) plus rounded corner at lower left and possible hinge thin at top, still attractive Very Fine appearance, a very rare stamp, especially unused, with 1974 Friedl certificate as "apparently unused".
Scott $12,500
Estimate $7,500-10,000 (Image)

Scott $12,500
Estimate $7,500-10,

Proprietary, 1873, $5 green & black, violet paper (Scott RB10a), a gorgeous used example, fresh and crisp with a sharp, proof-like impression and a neat August 1874 manuscript cancel; small thin spot at the lower right, Very Fine appearance. Only 119 examples are recorded in Thomas Kingsley's census, with a 2019 P.F. certificate.
Scott $11,000
Estimate $7,500-10,000 (Image)

Scott $11,000
Estimate $7,500-10,

Sale No: 757
Lot No:983
Symbol:(Cat No:RB11c

Proprietary, 1875, 1¢ green, rouletted (Scott RB11c), unused without gum, fresh and nearly perfectly centered, Extremely Fine.
Scott $175 for used
Estimate $100-150 (Image)

Scott $175 for used
Estimate $100

Sale No: 757
Lot No:985
Symbol:Cat No:RB13c

Proprietary, 1875, 3¢ orange, rouletted (Scott RB13c), o.g., hinge remnants, fresh and well-centered, Very Fine.
Scott $160 for used
Estimate $150-200 (Image)

Scott $160 for used
Estimate $150

Proprietary, 1875, 4¢ red, rouletted (Scott RB15c), light handstamped cancel, Fine to Very Fine.
Scott $450
Estimate $250-350 (Image)

Scott $450
Estimate $250-350

Sale No: 757
Lot No:987
Symbol:Cat No:RB16a, RB16b

Proprietary, 1875, 5¢ black, both silk paper & watermarked paper (Scott RB16a, RB16b), unwatermarked without gum, watermarked o.g. and small perforation stain; small tiny thins, otherwise Fine to Very Fine.
Scott $325 for used
Estimate $500-750 (Image)

Scott $325 for used
Estimate $500

Sale No: 757
Lot No:988
Symbol:Cat No:RB16c

Proprietary, 1875, 5¢ black, rouletted (Scott RB16c), a remarkable mint example, o.g., previously hinged, fresh and very well-centered, Very Fine, with a 2001 P.F. certificate.

An exceedingly rare stamp in sound, mint condition.
Scott $1,850 for used
Estimate $2,000-3,000 (Image)

Scott $1,850 for used
Estimate $2

Sale No: 757
Lot No:989
Symbol:(Cat No:RB17c

Proprietary, 1875, 6¢ violet blue, rouletted (Scott RB17c), an extraordinary unused (without gum) example, wonderfully fresh with marvelous color and intact rouletting, an Extremely Fine gem, with a 2019 P.F. certificate.

Quite possibly the finest unused example of the rare rouletted 6¢ violet blue Proprietary in existence.
Scott $1,100 for used
Estimate $2,000-3,000 (Image)

Scott $1,100 for used
Estimate $2

Proprietary, 1875, 6¢ violet, rouletted (Scott RB18c), an attractive used example with a printed cancel, "T.F.M.M.Co." (The Father Mathew (Temperance &) Manufacturing Co.); 5mm tear at the right (virtually invisible from the front) and tiny, inconsequential corner crease, fresh, Fine to Very Fine appearance, with a 2021 P.S.E. certificate.
Scott $2,500
Estimate $800-1,200 (Image)

Scott $2,500
Estimate $800-1,200

Sale No: 757
Lot No:991
Symbol:Cat No:RB28a

Proprietary, 1898, 2½¢ lake, imperf horizontally (Scott RB28a), vertical pair with top sheet margin, o.g., stamps never hinged, very lightly hinged in selvage only, Very Fine to Extremely Fine.
Scott $400 for hinged
Estimate $400-600 (Image)

Scott $400 for hinged
Estimate $4

Sale No: 757
Lot No:993
Symbol:Cat No:RB42

Proprietary, 1914, 4-3/8¢ black (Scott RB42), o.g., never hinged (tiny natural gum skip), Fine and rare.
Scott $3,000+
Estimate $1,500-2,000 (Image)

Scott $3,000+
Estimate $1,500-2,0