Liberia, 1906, 50¢-$5.00 Pictorials, Trial Color Plate Proofs. Set of 6 presentation proofs mounted on thick card, most with purple Perkins, Bacon & Co. oval handstamp on reverse, includes 50¢ blue and black, 75¢ brown and green, $1 green and black, $2 green and black & blue and black, and $5 carmine and black; light card toning on $5, F.-V.F., a scarce group. Scott No. 109P-113P  Estimate $250 - 350. $0 (Image)