Canal Zone, 1920, 5c deep blue & black, tied by "Cristobal, Canal Zone, Oct 6, 1920" machine cancel on corner card cover to Greenville, Ill., in combination with U.S. 1917, 10¢ Special Delivery tied upon arrival in U.S. by "New Orleans, La., Oct 11, 1920" duplex postmark, receiving backstamp, Very Fine, an exceptional combination usage. Scott No. 54+U.S. E11  Estimate $300 - 400. $0 (Image)