arms with oak leaves and legend "HELVETIA", rev: numeral 10 in a wreath. Minted from 1879 in Cupronickel (Cu-Ni, 3.0g); obv: head of Liberty (by Karl Schwenzer), legend "CONFŒDERATIO HELVETICA". Minted in cupronickel from 1879-present except in 1932-1939 (pure nickel). The 1850–1876 coins were taken out of circulation in 1886; the coins of 1879 onward remain legal tender. As the Batzen in the concordate currency of the 1820s represented a tenth of a franc (in pre-revolutionary currency: a seventh of a franc), the 10 centime coin retained the name of Batzen colloquially. This coin, unchanged in design and composition since 1879, entered the Guinness Book of Records as the oldest original currency in circulation. 20 centimes: billon (15% silver, 3.25g); designed by Karl Friedrich Voigt; obv.: federal coat of arms with edelweiss and legend "HELVETIA", rev: numeral 20 in a wreath. Minted from 1881 in nickel (4.0g); obv: head of Liberty (by Karl Schwenzer), legend "CONFŒDERATIO HELVETICA". Minted since 1939 in cupronickel (Cu-Ni); pre-1938 coins were taken out of circulation in 2004. Silver coins The , 1, 2 and 5 francs coins were silver, from 1968 Cupronickel. The pre-1969 coins were taken out of circulation in 1971. franc The franc coin of 1850/1851 was 2.5g of 90% silver; obv: seated Helvetia (by Friedrich Fisch), rev: " Fr." in a wreath. In 1875 debased to 83.5% silver, design changed to obv: standing Helvetia (by Albert Walch). From 1968: Cu-Ni (2.2g). 1 franc The 1 franc coin was 5.0g of 90% silver; obv: seated Helvetia (by Friedrich Fisch), rev: "1 Fr." in a wreath. In 1860 debased to 80% silver, design changed to obv: standing Helvetia (by Albert Walch). 1875–1967 83.5% silver, from 1968: Cu-Ni (4.4g). 2 francs The 2 francs coin of 1850/1857 was 10.0g of 90% silver; obv: seated Helvetia (by Friedrich Fisch), rev: "2 Fr." in a wreath. 1860: 80% silver, obv: a Swiss cross in a circle of stars, rev: legend "2 FRANCS" in a wreath. 1860–1863: return to the seated Helvetia motif. From 1874: standing Helvetia (by Albert Walch). 1874–1967: 83.5% silver, from 1968: Cu-Ni (8.8g). 5 francs The 5 francs coin of 1850 was modelled on the French 5 franc coin of 1795, which saw wide circulation in western Switzerland. The old Swiss franc of the Helvetic Republic was also known as livre suisse ("Swiss pound"), and the colloquial name Fünfliber of the 5 franc coin