Liberia, 1928 1¢//$2 Third Issue, Master Die Proofs. Set of 7 values (1¢, 3¢, 5¢, 10¢, 25¢, $1 & $2), in black on India, each mounted on brown card with serial number at top, Very Fine, a rare set. Estimate  $300 - 400. $0 (Image)