Proof 4c-6c 1890 Issue trial color plate proofs on wove (222TC two, 223TC two, 224TC), horizontal pairs, also incl. two extra 6c singles, all in different colors or shades, ample to huge margins, fresh, o.g., one 4c pair and one 6c single have usual minor thins, otherwise fine-extremely fine lot, Scott retail of the 6c values ($480.00), 4c and 5c values listed in Scott but unpriced