Golden State Mint Silver Bar. 999 Fine Golden State Mint is a full service mint that was established in 1974. With state-of-the-art facilities in Southern California and Central Florida, GSM offers a wide array of services. This Golden State Mint silver bar is. 999 Fine and is a convenient way to include bullion in your investment portfolio. The obverse of the 10 oz. The reverse is decorated with the inscription GOLDEN STATE MINT in a sleek diagonal pattern.