10 Heller Aigen

Aigen is a small locality absorbed into Salzburg proper in 1935, and notes like this one were issued under the Austrian Notgeld system that proliferated from 1919 onward as small-denomination coins vanished from circulation. Municipal authorities — down to the village level — were permitted to print their own emergency fractional currency, creating hundreds of distinct issuers across a few years. The W. Müller imprint places production firmly in Salzburg city, a common arrangement for the surrounding district communities who lacked local print capacity.

The "b" suffix in the Jaksc/Pick reference indicates a recognized variety within the series, most commonly a paper stock or color distinction from the primary type.