Bidspirit auction | Lot of 3 banking covers

Lot of 3 banking covers with perfin stamps (PERFINS), Austria and the Netherlands. Units in lot: 3 - 1. Cover of Lippmann, Rosenthal & Cie, Amsterdam, addressed to the Wiener Bankverein, Prague branch. Bearing a 20 value stamp with perfin perforation. 2. Cover of the K.K. Privilegirte Österreichische Länderbank addressed to J. & W. Seligman & Co., New York. Bearing Franz Joseph 20 Heller stamps with perfin perforation and an ”ÜBERPRÜFT” censorship cachet. 3. A further cover of the K.K. Privilegirte Österreichische Länderbank addressed to J. & W. Seligman & Co., New York, with a Franz Joseph 25 Heller stamp, perfin perforation and an ”ÜBERPRÜFT” censorship cachet.