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.
Economy of Kosovo
The euro is the official currency of Kosovo. Kosovo adopted the German mark in 1999 to replace the Yugoslav dinar, and later replaced it with the euro, although the Yugoslav (and later Serbian) dinar is still used in some Serb-majority areas (mostly in the north). This means that Kosovo has no levers of monetary policy over its economy, and must rely on a conservative fiscal policy to provide the means to respond to external shocks.