WIR Bank
The WIR Bank, formerly the Swiss Economic Circle (German: "Wirtschaftsring-Genossenschaft"), or WIR, is an independent complementary currency system in Switzerland that serves businesses in hospitality, construction, manufacturing, retail and professional services. WIR issues and manages a private currency, called the WIR Franc, which is used in combination with the Swiss Franc to generate dual-currency transactions.
Coins of the Swiss franc
Since 2004, moreover, the existing pure nickel 20 centime coins of the years 1881–1938 have been withdrawn from circulation because machines cannot detect them. Today, all the coins except the 5 centime coin (aluminum-bronze since 1981) are in a copper-nickel (cupronickel) alloy. Seven coins (1995) are currently in circulation: