1976, Belgium, Leopold III. Silver 50 Francs Coin. Mint Year: 1976 Reference: KM-158.1. Denomination: 250 Francs (250 Frank) - Silver Jubilee of the King! Material: Silver (.835) Weight: 24.89gm Diameter: 37mm Baudouin (Dutch: Boudewijn, German: Balduin; 7 September 1930 – 31 July 1993) reigned as the fifth King of the Belgians, following his father’s abdication, from 1951 until ...