100 Francs 6th series

The 6th series was designed by husband-and-wife team Ernst and Ursula Hiestand, an unusual choice — the SNB had not previously commissioned a design partnership for a complete note series. The series was actually produced and stockpiled well before public release; printing began in the late 1960s, but the notes were held in reserve for years as the SNB delayed introduction.

The sheer volume of signature combinations on this note — nearly forty across eighteen years — reflects the SNB's practice of dual signing by the Bank Council president and the Directorate chairman, both positions turning over independently. Collectors treat signature pairings as distinct varieties, and some combinations are considerably scarcer than others.

Withdrawn in 2000 when the SNB demonetized the entire 6th series simultaneously.