This 1969 Chilean definitive stamp showcases the impressive Rapel Hydroelectric Power Plant, located on the Rapel River in the O’Higgins Region. The green engraving captures the massive dam structure set amid the surrounding Andean foothills, symbolizing Chile’s advancement in renewable energy and modern infrastructure during the 1960s. Issued by Correos de Chile, it was printed by the Casa de Moneda de Chile and has a face value of Eº0.40. A fine example of Chile’s industrial-themed philately, this issue appeals to collectors of engineering, dam architecture, and Latin American development themes.