Saudi Arabian Gold Guinea Coin Brooch. (1950) Saudi Arabian one guinea gold piece. This one-year type coin has the same gold content as the British sovereign. With an approx. purity of 0.917 (22K). Approx. Total Weight: 8.8 dwt - All silver, gold and/or jewelry lots or invoices containing said lots MUST be paid for via WIRE TRANSFER, no other forms of payment will be accepted.