This page provides two excel files with historical exchange and interest rates for Switzerland for the years between 1850 and 1914. The data are at the weekly frequency. For the years between 1880 and 1899, the main source is:
Kalkmann, Ph. (1900), „Untersuchungen über das Geldwesen der Schweiz und die Ursachen des hohen Standes der auswärigen Wechselkurse„. St. Gallen: Zollikofer’sche Druckerei.
For the other periods, the data have been taken from the electronic archive of the newspaper „Neue Zürcher Zeitung“ (NZZ) and the „Eidgenössische Zeitung“.
Nils Herger 