This Belgian commemorative stamp, issued in 1929, honors King Albert I, celebrated as the “Knight King” for his leadership during World War I. The portrait depicts him in military attire, symbolizing his role as Commander of the Belgian Army. The inscriptions “1830–1929” mark the centenary of Belgium’s independence. Rendered in deep blue, the stamp carries a denomination of 1.75 Francs and showcases fine engraved detail typical of Belgian issues from the interwar period. A significant piece for collectors of royal and historical themes.