Enrique Woolfolk sent this ad from the August-September 1958 issue of Las Artes Gráficas en México (Vol. XI, No. 67), which he says was the Mexican version of The Inland Printer. This Spanish language trade journal has 23 entries in WorldCat.
The most interesting bit of information in this ad may be the name of the selling agent: Papeleria San Agustin. This agent may be noted in the model/serial number cards at NA Graphics for Vandercooks exported to Mexico.