This attractive commemorative pair was issued by South Korea in 1966 to highlight the nation’s First Five-Year Economic Development Plan, symbolizing rapid modernization and infrastructure expansion. One stamp features transportation growth—aircraft, maritime shipping, and industrial bridges—while the companion design illustrates communications technology with radar installations and telecommunication systems. These stamps represent an important historical phase in South Korea’s transformation into an industrial economy. Clean typography, modernist layout, and symbolic industrial imagery make the set appealing for economic history, transport, and technology thematic collections. Well-centered mint or lightly used pairs are particularly desirable for collectors of Asian development-era philately.