This striking airmail stamp was issued by Mexico in 1974 to commemorate the 100th anniversary of the Universal Postal Union (1874–1974). The design features a colonial-era mailbox (“Buzón Colonial”), sculpted in the form of a human face with an open mouth serving as the mail slot. The bold inscription “UNION POSTAL UNIVERSAL” highlights Mexico’s recognition of international postal cooperation.

Printed by T.I.E.V. and designed by H. Rodríguez, the stamp carries a denomination of 80 centavos airmail (80¢ Aéreo). It blends history with symbolism, celebrating both Mexico’s colonial postal heritage and its role in the modern global postal network.