Issued in 1976 by the Republic of San Marino, this 150 lire stamp commemorates “Italia 76,” likely tied to a major Italian cultural or philatelic event of that year. Designed by G. Valentini and printed by I.P.S. in Rome, the stamp features a modern, abstract composition of sharp blue peaks over a backdrop of alternating red and green stripes—echoing the Italian national colors. The bold geometric style reflects a 1970s design sensibility, emphasizing progress, dynamism, and international presence.