100 Franken / Francs / Franchi

The Aargauische Bank was one of roughly three dozen Swiss cantonal and private banks still issuing their own notes in the 1880s, operating under the patchwork of cantonal concessions that preceded federal unification of the currency. The Swiss National Bank was established in 1906 and given the monopoly on note issue, after which institutions like the Aargauische Bank were required to withdraw their circulation — meaning notes still outstanding from the earlier part of this series' window were being retired by the time the later dates were signed.

The trilingual denomination line reflects Aargau's administrative bilingualism rather than any pan-Swiss policy on this type — French and Italian were included as a matter of institutional convention across most private issuers of the period.