Liberia, 1920 Official Surcharge Issues on Cover. 14 covers; includes an array of unusual combination frankings and some better towns, Executive Mansion cover with pair of each value with double surcharge (4¢ on 2¢ with one inverted), 4¢ on 2¢ combination on registered 2¢ entire to South Africa, etc.; condition varies, F.-V.F. overall. Scott No. O111-O112  Estimate $300 - 400. $0 (Image)