The 20 Franc coins are 21 mm in diameter, weigh 6.45 grams and at 90% pure, contain .1845 ounces or 5.801 grams of pure gold.
The French Rooster coins were produced from 1899 - 1914, and are the most popular gold bullion coins produced by France. They are minted at the Paris mint.
The front of the coin features and image of Marianne, France's national symbol.
The reverse of the coin features and image of "Le Coq Gaulois" , or the Gallic Rooster. In addition to the French Rooster, France also produces the Napoleon coin, which is a similar size.
Each coin is sold in a plastic slip.
The gold Napoleon coin is one of a number of European gold coins that were produced in the 1800s or early 1900s. The European coins generally have a weight of 5grams to 8 grams, instead of today's 1 ounce denominations. Examples include the British Sovereign, the French Rooster, the French Napoleon, the Danish Kroner and the Italian gold Lire.