This classic Gibraltar stamp features the historic St. George’s Hall, one of the famous Great Siege tunnels carved inside the Rock of Gibraltar. The scene shows multiple mounted cannons positioned within the fortified cavern, reflecting Gibraltar’s long military heritage. Issued during the reign of Queen Elizabeth II, the design combines wartime history with early QEII portraiture, making it a notable mid-20th-century collector piece. The salmon-rose and deep navy palette adds strong visual appeal, especially for collectors of military or tunnel-fortification themes.