1760 Norwich, England to Philadelphia, Pa. Incoming folded letter sheet endorsed Via New York with magenta manuscript "1/-" ship rate and brown London "18 OC" Bishop mark on reverse, straight line New York entry postmark and additional manuscript "3dwt" and "1/3" rates; light cover toning and small flap repair, F.-V.F. Estimate  $300 - 400. $0 (Image)