The Mexican Peso was originally released in 1921 in honor of Centenario, Mexico's 1st Century of Freedom!
The pendant measures 1.13 inches wide and 1.5 inches long (including the bail). The Mexico coin has a Mayan symbol on the front with "VEINTE PESOS, 15 Gr. ORO PURO" written along the edge. On the back, there is the signature eagle seal with "ESTADOS UNIDOS MEXICANOS, 1919" written along the edge.
This gold coin is 21.6 Karat Gold and the coin with the holder weighs approximately 18.2 grams.