The Two Francs coin is a circulating denomination of the Swiss Franc. Given that Switzerland has four official languages, it has three different names: Franken in German, franc in French and Romansh, and franco in Italian. It is worth noting that the denomination is a "half franc" and not "50 centimes" for historic reasons, being initially modelled on a denomination of the French franc which was a "demi franc", and to distinguish it from the smaller denominations; initially, all "francs" (including the half franc) were full-bodied silver, while the centimes were either billon (low-grade silver) or base metal.
The first version of the one franc coin featuring a seated figure of Helvetia was designed by Friedrich Fisch and engraved by Antoine Bovy. The reverse shows the value, a numeral 2, and a language-neutral abbreviation of the denomination, Fr. within a wreath whose left part consists of oak branches and the right part of various Alpine flowers. This original reverse has remained unchanged and is still used on current coins. This version was heavier than current coins (10 grams) and made of 0.900 silver. It was demonetised in two stages - 1st January 1869 for coins issued 1850-1857, then 1st January 1878 for coins issued in 1860-1861.
In 1875, the obverse was changed to a new design by Albert Walch featuring a Standing Helvetia. The coins were issued to the specifications of the Latin Monetary Union, so the metal was somewhat debased to 0.835 silver (83.5% silver, 16.5% copper). This second silver version of the Two Francs was issued until 1967 and was demonetised on 1st April 1971.
Current Two Francs coins are made of cupro-nickel (75% copper, 25% nickel); this version was first issued in 1968 and is still currently produced. Coins issued in 2011 have been in circulation for eight years.
The obverse, which has remained unchanged from 1875 to the present, features Helvetia standing on a platform, her head facing to the left. In her right hand (at the left), she holds a lance, and with her left (at the right), she props up a shield with the Swiss Cross at centre. In exergue is the legend HELVETIA.
There are 23 five-pointed stars along the rim of the coin, going from the lower left to lower right boundaries of the obverse. These represent the 20 full Swiss cantons and the six half-cantons, which are collectively represented by the three remaining stars. The tip of Helvetia's lance extends to the rim and separates the ninth and tenth stars in the sequence. Nine of the stars are engraved up to the lance, two between the lance and Helvetia's face, and 12 to the right of the central allegorical figure.
The engraver's signature, A.BOVY INCT. (an abbreviation for the Latin text "Antoine Bovy incidit", meaning "engraved by Antoine Bovy), is located around below, displayed counter-clockwise in small letters. It is split in two by the legend: "A.BOVY" appears to the left of "HELVETIA", and "INCT." to the right.
The reverse, which has remained unchanged since 1850, shows the value - a numeral 2, and a language-neutral abbreviation of the denomination, Fr., above the date: 2011 within a wreath whose left part consists of oak branches and the right part of various Alpine flowers.
Below the ribbon of the wreath is the mint mark B of Swissmint (formerly known as the Bern Mint, then the Federal Mint of Switzerland).
The Swissmint report lists mintage of 7,026,000 and also lists 14,000 "Stempelglanz" (brilliant uncirculated) coins in the year's mint sets and 8,000 in "baby sets" plus 4,000 "Polierte Platte" (proofs) in the year's proof sets. It is not explicitly stated that coins in sets have been calculated into the main figure, but it seems to be the case.