Austria, 1850, 3k-9k First Issue Covers. 5 covers and front; 3k single and double usages from Wien and Prag, similar 6k from Prag and Salzburg (one stamp with paper fold), 9k registered usage from Plan and front usage to New York via Liverpool, F.-V.F. or better. Scott No. 3-6  Estimate $300 - 400. $0 (Image)