1853 (Jul. 6) Boston Mass. to Shanghai, China, tissue paper cover with original thick contents, "Boston Br. Pkt. Jul 6" exchange cds with red "Paid" straightline and pencil "140" prepaid rating, red crayon "1.30" credit rating, carried by Cunard Line Niagara from Boston Jul. 6th to Liverpool arriving Jul. 17th, red London Paid (7.18) transit cds, Hong Kong (9.8) transit backstamp, docketed as received Sep. 18th; cover edge wear from think contents, Very Fine, A rare double-weight use at the $1.40 British Mail rate via Marseilles for up to ¾ oz. Estimate  $400 - 600. $0 (Image)