3¢ 1851-57 Color Study, selection of 61 stamps arranged by year on printed cards by Dr. Amonette, includes nine #10s with shades of pale-deep orange brown, copperish (SR 4), yellowish (SR4), two reddish (R3)and bright, an experimental orange brown, and a plum (SR4); all with handstamped cancels, some faults to be expected, F.-V.F., a very desirable study. Scott No. 10/11  Estimate $2,000 - 3,000. $0 (Image)