Issued in 1969, this 40 centavos commemorative stamp celebrates the inauguration of the Sistema de Transporte Colectivo Metro in Mexico City. Designed by Lance Wyman, who also created the Metro’s iconic orange “M” logo, the stamp depicts a stylized orange subway train — a symbol of modern urban transport and national progress. The clean, modernist design and bold color scheme reflect Mexico’s mid-century design renaissance and optimism during a period of rapid urban expansion. A must-have for collectors of Mexican and transportation-themed philately.