This distinctive 1966 airmail stamp from Mexico commemorates the idea of Central American unity and regional cooperation. The bold typographic design highlights the year 1966 surrounded by the names of Central American nations such as Panama, El Salvador, Honduras, Nicaragua, Costa Rica, and Guatemala, emphasizing the theme “Centro Americana.” Designed by Valtierra, the stamp uses striking green and red colors with the inscription “Aéreo México.” Issued for international airmail usage, it represents Mexico’s support for regional integration and communication across Central America. Its modern graphic style makes it an appealing piece for collectors of airmail and Latin American thematic stamps.