1863 (Nov 7) Envelope from Innsbruck to Boston, prepaying the 60kr rate comprising 10kr (German-Austrian Postal Union transit) and 50kr debited to Prussia (« Wf50 » notation), with 1863-64 15kr, four singles, tied by dispatch cds’s and Aachen 23c credit cds in purple at right, red Br. pkt. Boston arrival at top, crossing the Atlantic on the Cunard SS « Arabia »; a very fresh, attractive and scarce small cover.