Vierer

Solothurn's cantonal coinage survived well into the late 18th century largely because the Swiss Confederation never achieved monetary unification — each member state retained the right to issue its own small denominations, producing a circulation nightmare of incompatible billon fractions. The Vierer occupied the lowest functional tier of Solothurn's monetary system, struck in debased silver to keep production costs in line with face value.

The series ended with the French invasion of 1798 and the imposition of the Helvetic Republic, which swept away cantonal monetary autonomy overnight.