Liberia, 1880, 12¢ Yellow, Plate Study, consisting of over 200 stamps; many multiples including margin blocks of 35 and 29, block of 8, two blocks of 6, and four blocks of 4, includes diagrams of the 10 tranfer types, defective transfers, etc., F.-V.F. overall. Scott No. 19; $1,000+  Estimate $250 - 350. $0 (Image)