The Bank of France issued French coins in 10 different denominations, including Aluminium-Bronze coin
20 centimes, first time issued in 1962. Marianne on the obverse, the allegory of Liberty - the symbol of the culture and the national emblem of France. 
French Frank was withdrawn from circulation in 2002, and since 1999, the euro becomes the shared currency of eleven EU countries, including France.
Marianne is a national symbol of the French Republic, an allegory of liberty and reason, and a portrayal of the Goddess of Liberty. It is a significant republican symbol, opposed to monarchy, and an icon of freedom and democracy against all forms of dictatorship. Her profile stands out on the official government logo of the country, is engraved on French euro coins and appears on French postage stamps; it also was featured on the former franc currency.
OBVERSE: The national emblem of France Marianne in left profile wearing the Phrygian cap is surrounded with inscription.
Lettering: REPUBLIQUE FRANÇAISE LAGRIFFOUL
Engraver: Henri Lagriffoul 
REVERSE: The value is surrounded with a wheat ear, an olive branch and the motto.
Lettering: A.DIEUDONNE LIBERTE·EGALITE·FRATERNITE· 20 CENTIMES 1974
Engraver: Adrien Dieudonné
EDGE: Smooth
Designer : "LAGRIFFOUL" - Henri-Albert Lagriffoul (1907–1981), was a French sculptor and car racer.
Designer : "A.DIEUDONNE" - Adrien Dieudonné (1912-1982) was a French medalist and sculptor .
Engraver : "owl 🦉" - Raymond Joly ( 1911-2006), was French engraver and medalist, won the Prix de Rome in 1942. From 1957 Engraver-General.
Mint: "cornucopia" - Paris France, struck at the mint of Pesac 
Mintage in 1972 39,755,000
Country             France 
Period                Fifth Republic (1958-2020)
Type                 Standard circulation coin
Years                1962-2001
Value                 20 Centimes 
Currency             New franc (1960-2001)
Composition    Aluminium-Bronze
Weight                  4.00 g
Diameter               23.5 mm
Thickness          1.4 mm
Shape                   Round
Orientation           Coin alignment ↑↓
Demonetized         02-17-2002
References        F# 156, Gad# 332, Schön# 230, KM# 930