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.
Postage stamps and postal history of Switzerland
All of the preceding issues were declared invalid on 1 October 1854, and replaced with the seated allegorical figure "Helvetia", the first of several issues known as "seated Helvetias". The figure was embossed but only the outline was colored, making it rather hard to pick out. This was the first issue to deal with the multiple languages of Switzerland; in addition to the word "FRANCO" at the top, the other three sides listed the denomination in rappen, centimes, and (Italian) centesimi.