Issued in 1964, this 80 centavos Mexican airmail stamp depicts the monumental Presa Netzahualcóyotl (Netzahualcóyotl Dam), located at Malpaso in Chiapas. The image highlights the impressive engineering of the dam, completed that same year, with a curtain height of 138 meters and a massive storage capacity of 12,960,000,000 cubic meters. It commemorates Mexico’s advances in hydroelectric power and infrastructure during the 1960s. Printed by the Talleres de Impresión de Estampillas y Valores, it stands as a fine example of mid-century Mexican industrial philately.