1950, Saudi Arabia, Ibn Saud. Beautiful Silver 1 Riyal Coin Reference: KM-18. Denomination: 1 Riyal Mint Year: 1950 (AH 1370) Material: Silver (.917) Diameter: 30.5mmWeight: 11.6gmSaudi Arabia, officially known as the Kingdom of Saudi Arabia, is the largest Arab state in Western Asia by land area (approximately 2,150,000 km2 (830,000 sq mi)), constituting the bulk of the Arabian ...