R134P4-150P4, 1c-$20 Third Issue, Plate proofs on card, blocks of four, exceptionally fresh, brilliant colors, Extremely Fine, a premium set (Scott $3,180). (Image)

CV. 2,500-3,000

R137P4, 1871 5c Orange and black, Plate proof on card, block of eight, pos. 5 showing double transfer in black vignette, Extremely Fine, rare and most probably unique, this being the discovery example. (unlisted in Scott) (Image)

CV. 2,000-3,000