This 4-pence Gibraltar stamp, issued in 1987, depicts the Bofors L40/70 anti-aircraft gun—a Swedish-designed automatic weapon introduced in 1951 and widely used by NATO forces. The detailed artwork by A.G. Ryman M.B.E. showcases the gun mounted on its mobile platform, emphasizing precision engineering and military heritage. The stamp forms part of Gibraltar’s series celebrating significant artillery and defense technology, reflecting the territory’s strategic military importance. Printed by Format International Security Printers, it combines technical illustration with historical tribute.