This Spanish commemorative stamp, issued in 1967, honors the 50th Anniversary (1917–1967) of the Feria Muestrario Internacional de Valencia, one of Spain’s most important industrial and commercial fairs. The design presents the iconic exhibition pavilion along with the elegant foreground fountain, both rendered in rich monochrome detail typical of mid-century Spanish engravings. Issued at a high denomination of 150 pesetas, it was intended for heavier or international postal use, making genuinely fine examples desirable. A must-have piece for collectors of Spanish architecture, trade history, and commemoratives from the Franco-era postal period.