State seal of Mexico according to changes in the October 25, 1976 by Decree No. 39'published in the Official Gazette of the State of Mexico,on April 16, 1941, in use between 1977 and 1995 . Based on the book shown on Javier Romero Quiroz, territorial division and heraldry of the state of Mexico, published in 1977, in Mexico, for government of Estado de Mexico. And file http://es.wikipedia.org/wiki/Archivo:Escudo_del_Estado_de_M%C3%A9xico.png
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Sarumo74