Vol. 50 in Schriftenreihe der Schweizerischen Kreditanstalt. 
Otto Paul Wenger.  Published by the Schweizr. Kreditanst., Zürich, 1978.  PB.   67 pages, illustrated in the text.  142 x 210mm. German text.

A simple, but good introduction to ancient, medieval and more modern numismatics.