The value of any fine made firearm is based on condition,condition,condition.If your early made Browning auto-5 shotgun is showing 60%or better in original finish on the wood and metal.The value will be between 450-600 dollars.Values will drop as the condition of your shotgun goes down accordingly.
With the serial number that you provided,your Browning auto-5 12 gauge shotgun was made by FN of Belguim for Browning in 1947.
With the serial number that you provided,your Browning auto-5 shotgun was produced in Belguim by FN for Browning in the year 1951.
Your browning auto-5 shotgun was made by FN of belguim for browning in 1957.
Your browning sweet sixteen shotgun was made by FN in belguim for browning in 1960.
Your browning 16ga shotgun was made by FN of belguim for browning in 1938.
A browning auto-5 shotgun with the serial number you provided,was made by FN of belguim for browning in 1914.
Your belguim made browning auto-5 standard weight shotgun was made in 1962.
The serial number prefix of 0S indicates that your Browning sweet sixteen shotgun was made by FN of Belguim for Browning in the year 1960.All Browning shotguns made prior to the 1976 were Belguim made shotguns.So to answer your question,yes you have a Belguim Browning.
Your browning auto-5 shotgun was made by FN of belguim for browning in 1947.That makes your shotgun 64 Years old.
Depending on the model it can be found on the bottom of the receiver or on the barrel. how to find the year of a belguim browning over and under shotgun by the serial number 53125
With the serial number that you provided,your Browning superposed shotgun was made in Belguim for Browning in the year 1955.
With the serial number that you provided,if you have a Browning model auto-5 shotgun?Then this shotgun was made by FN of belguim for Browning in 1939.