Philadelphia Pa Jun 12 1861, two strikes of cds ties two 1¢ blue (63) vertical pairs on cover Polytechnic College of Pa. West Penn Square advertising cover to Bristol Pa. prepaying the 1¢ to the mail carrier fee plus 3¢ postage, U.S. Penny Mail backstamp; small stamp faults, small cover mend lower right, F.-V.F., ex-Vernon Morris; with 2000 P.F. certificate. Estimate  $400 - 600. $0 (Image)