(Outgoing Philadelphia) 1866 Philadelphia, Pa. To Staefa, Switzerland, unpaid folded letter sheet with "Phila, Pa., Mar 20" duplex postmark and "New York, 3, Mar 21" cds, boxed "F./30" accountancy handstamp applied in Paris and red crayon "110" rappen due, transit and receiving backstamps, F.-V.F. Estimate  $150 - 200. $0 (Image)