The Mexican Dirty War “Guerra Sucia 1964-82” 20 Centavos Coin is a piece of art and history from Mexico, specifically from the historical period of Mexico between 1964-82. This uncirculated coin, minted in 1979, is a unique and collectible item that serves as a reminder of a dark time in Mexican history. The certification of the coin is uncertified, adding to its authenticity and value for collectors interested in Mexican coins and history. I have two of these the second one is a 1975.