The Value of 20 Swiss Franc Coins calculator computes the value of 20 Swiss Franc gold coins.
INSTRUCTIONS:
 (ct) Count of Coins
 (nV) Numismatic Value Factor per Coin (price percent above spot)
Coin Value (CV): The calculator returns the total value of the coins in U.S. dollars, the value of gold (bullion) in the coins and the total weight of gold in the coins. However, these can be automatically converted to compatible units via the pulldown menu.
The Math / Science
The Swiss 20 Franc Gold coin was introduced in 1883
The specifications are as follows:
 21.2 mm in diameter
 1.4 mm thick
 6.4516 grams in total mass
 90.0% gold
 0.1867 oz of gold (5.806 g)
20 Swiss Franc Market Value Calculator
Gold SPOT PRICES 

($/gram) 
($/troy_oz) 

$61.726 
$1919.89 

Updated every Two Minutes 

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