The Ten Francs coin is a denomination of the Swiss Franc. Given that Switzerland has four official languages, the Franc has three different names: Franken in German, franc in French and Romansh, and franco in Italian. Initially when federal Swiss coinage was introduced in 1850, all "francs" (including the half franc) were full-bodied silver, while the centimes were either billon (low-grade silver) or base metal.
The normal circulating 5 FR denomination was supplemented by circulating commemorative one-year type 5 Franc coins in silver and copper-nickel.
In 1999, Swissimint changed the concept and started striking non-circulating commemoratives for collectors only, which were bimetallic 5 Francs at first. After only six coins were issued in the first five years, this format was discontinued. Further non-circulating bimetallic coins are now denominated as 10 Francs, such as those listed below.
The 10 Francs are bimetallic and have the same dimensions as the bimetallic 5 Francs, but their colours are reversed: with an Aluminium Bronze outer ring (92% copper, 6% Aluminium, 2% Nickel) and a copper-nickel inner circle (75% copper, 25% nickel). They are issued in topical series, celebrating various aspects of Swiss heritage or nature.
The 2011 Ten Francs collector coin celebrates the Bern Onion Market (German: Berner Zibelemärit). It is part of the second series about Swiss customs (German: Schweizer Bräuche; French: Coutumes suisses); the first series was in the 5 Francs denomination.
The obverse of the coin is common with the other commemorative 10 Francs and is designed by Roland Hirter; the reverse is designed by Stefan Haenni.
The Zibelemärit (in Bernese German dialect) is an annual market with aspects of a fair in the old town of Bern, Switzerland. It takes place the fourth Monday in November. Historical research indicates that the Zibelemärit originated in the 1850s with marmettes, farmer's wives from around Murten, coming to Bern at around St. Martin's Day to sell their produce; however, a persistent local legend holds that the Zibelemärit is a much older festivity. According to this legend, the Bernese awarded the people from the nearby city of Fribourg the right to sell onions in the city in reward for their aid after a fire destroyed much of Bern in 1405.
Bimetallic 10 Franc coins are legal tender but are issued in small quantities for collectors only and do not circulate. | 
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