Issued by Belgium in 1999, this commemorative 17-franc stamp marks the 50th anniversary of NATO (1949–1999), highlighting the nation’s long-standing role in the alliance. The design features a Belgian Leopard 1 tank advancing through dust, symbolizing military readiness and collective defense. It carries inscriptions in Dutch ("50 Jaar NAVO") and French ("50 Ans OTAN"), reflecting Belgium’s bilingual identity. A crisp, modern photographic style and the royal insignia enhance its appeal for military-themed and geopolitical collections. Highly sought after by collectors of NATO history, Belgian military philately, and late-20th-century commemoratives.