Issued by Mexico in 1977, this airmail stamp commemorates the 60th Anniversary of the Mexican National Navy (Marina Nacional). The design features the tanker vessel R.M. Greaves of Navmex docked at port, symbolizing Mexico’s maritime strength and commercial naval development. The industrial harbor background reflects modernization of national shipping and maritime infrastructure during the 20th century. Denominated 1.60 Aéreo, the stamp was intended for international airmail usage. A strong thematic collectible for naval, shipping, and transport philately collections.