Legal tender
The Swiss franc is also the currency used for administrative and accounting purposes by most of the numerous international organisations that are headquartered in Switzerland.
Zürich frank
The Frank was the currency of the Helvetian Republic from 1798. The Helvetian Republic ceased issuing coins in 1803. Zürich issued coins between 1806 and 1848. In 1850, the Swiss franc was introduced, with Swiss francs = 1 Zürich Frank.