History of Switzerland
Switzerland's most important exports during the war were precision machine tools, watches, jewel bearings (used in bombsights), electricity, and dairy products. During World War Two, the Swiss franc was the only remaining major freely convertible currency in the world, and both the Allies and the Germans sold large amounts of gold to the Swiss National Bank. Between 1940 and 1945, the German Reichsbank sold 1.3 billion francs worth of gold to Swiss Banks in exchange for Swiss francs and other foreign currency.
Banknotes of the Swiss franc
During the 19th century the cantons (states) of Switzerland had the right to print their own notes. Following the law of 8 March 1881 the Swiss National Bank had the exclusive right to issue banknotes in Switzerland. Its first notes were issued in 1907. Since then, nine series of Swiss franc notes have been printed, six of which have been completely released for use by the general public, and a new series started being released in 2016.