20 Swiss francs converts to about $21.50 in US dollars.
$1.00 us money
To determine the exact value of a coin of a Confederatio Helvetica 20 B 1913 a couple different things would need to be taken into consideration. Most importantly, the condition of the coin.
To determine the exact value of a coin of a Confederatio Helvetica 20 B 1913 a couple different things would need to be taken into consideration. Most importantly, the condition of the coin.
The value of a helvetica 1913 20 rappen
(about) 78,000
10~20$
How much an 1883 Confoederatio Helvetica Rappen is worth depends on its condition. The typical value of such a coin is 12 US dollars.
"Confoederatio Helvetica" is the Latin name for Switzerland. Your coin is not unusual and has an exchange value of about $1.10 as of 09/2012
20 Swiss Francs.
The coin you are referring to is from Switzerland ("Confoederatio Helvetica" is Latin for "Swiss Confederation"), you haven't identified the denomination or the condition of the coin. Switzerland produced coins for 1, 2, 5, 10 and 20 Rappen in 1938, but not the usual 1/2 Franc, Franc, 2 Franc and 5 Franc coins (although very valuable patterns of the 1 and 2 Franc coins were produced). Depending on denomination and condition of your coin, it could be worth between a few cents and perhaps $20.
20 cents
You have a coin from Switzerland (The Helvetian Confederation, to the Swiss). Anything that new is almost certainly only worth face value. You didn't state the coin's denomination - an important piece of information - but exchange rates in early 2010 have been in the range of CHF 1 = US$ 0.90