3¢ Washington Essay on Stiff Stamp Paper, by Bradbury, Wilkinson & Co, England
3¢ Washington Essay Die on India, by Danforth, Bald & Co, Philadelphia, PA
1847 5c red brown
1847 10c black
1c Die on proof paper, various colors
1861 1c Plate on white paper, perf
1c Plate on pelure paper, gummed, red
Die on white glazed paper
1861-66 1c blue
1861 1c Blue Specimen with Control Number 9012 in Carmine
3c Washington
3c Finished "Premiere Gravure" plate essay on semitransparent stamp paper
1861-66 3c rose
1861-66 10c dark green
1903 Die on proof paper, various colors
1861 30c Essay
1861-66 30c orange
1861 90c Essay
1861-66 90c blue
1861-66 2c black
1861-66 5c brown
1861-66 15c black
1861-66 24c lilac
3c Plate Essay
1867 3c Plate on clear white paper, imp
1867 3c Essay, perf 12
1867 3c Essay
1867 3c Plate Essay
1867 3c Plate on white paper
3c Dark Red, Washington, no gum issued
1867 3c Plate on semitransparent white
3c Essay
3c perf 12, various colors
1864 3c rose perforated on gold beaters
1864 3c lake
1c Plate on stamp paper, perf. 12 with
1c Plate on stamp paper, perf 12, gummed
1c plate on stamp paper, imperf, gummed
1869 2c essay
1869 3c Die on India
1869 3c Essay, various colors
6c Die on proof paper
12c Essay in various colors
24c Plate on dull yellowish tinted paper
30c Plate essay in black on thin surface tinted paper
90c Plate on medium India paper, imperf
1870-71 3c green
1870-71 12c dull violet