Official participation diploma issued for the Mexico City 1968 Summer Olympics, 12 x 12, with background featuring the Mexico Games “68” pictogram logo, and text in Spanish (translated): “The Organizing Committee of the Games of the XIX Olympiad awards Diploma to Margarita Ma. Trevino S. of Mexico for her participation as press center aide, Mexico, D. F. October 1968.” Facsimile signatures of organizers Avery Brundage and Pedro Ramirez Vazquez are printed below. In very good condition, with overall rippling and dampstaining, a few edge tears, and some paper loss to the bottom edge.