1870 (Dec. 28) Innsbruck, Austria To Boston, Mass., cover bearing two Austria 10kr blue singles tied by two strikes of Innsbruck cds, blue "15Wf" Kr credit to NGU, carried by Cunard Line Abyssinia to New York arriving Jan. 13th, red "New York Paid All Jan 14" exchange cds; accompanied by second cover from same correspondence that is shortpaid, 1870 (Jul. (28) Innsbruck to Boston bearing Austria 5Kr strip of three, showing framed "Unzureichend, frankirt" handstamp and various debit ratings; minor filing holes, Very Fine exhibit pair showing the prepaid and shortpaid 20k rate. Estimate  $150 - 200. On July 1st 1870, a new postal convention between the US and NGU established a 20 Kr per 15 gram rate for prepaid letters sent from Austria to the US by closed mails through Belgium and England. $0 (Image)