(Outgoing Philadelphia) 1863 Philadelphia, Pa. To Mons, Belgium. Cover franked with 1861, 1¢ blue + 10¢ yellow green, pair paying the 21¢ French mail rate via England, partial red "Philadelphia, Paid, Oct 20" cds and manuscript "18" credit to France, reverse with "France Par Mouscron" transit and receiving backstamps, Very Fine, a rare usage to Belgium by French Mail. Scott No. 63+68  Estimate $750 - 1,000. $0 (Image)