Issued by France in 1969, this 0.80 franc definitive commemorates the Barrage de Vouglans in the Jura region, one of the country’s major hydroelectric engineering achievements. The stamp presents a detailed engraved view of the curved concrete dam set within the rugged valley, with high-tension transmission towers extending across the landscape—symbolizing France’s expanding post-war energy infrastructure. Designed and engraved with classic French precision, the issue reflects the nation’s commitment to modern energy development during the late 1960s. A strong thematic item for collectors interested in engineering, hydroelectric power, and modern French architecture.