What year and value is your browning auto 5 Light 12 Belgium made with markings 9 g with a serial number of 50762?

Your 9g prefix dates your Browning auto-5 light weight shotgun to the year 1959.The value cannot be determined unless you provide the overall condition of your shotgun(remaining finish on the wood and metal)the type of barrel(plain,solid matte rib,or vent rib) and bore condition.