50-500 USD or so
If we are talking about a browning auto-5 shotgun,and the serial number is 1M not IM then your shotgun was a standard weight model auto-5 shotgun in 12 Gauge that was made by FN of belguim for browning in 1961.
Your belguim made browning auto-5 standard weight shotgun was made in 1962.
Your serial number indicates that your Browning standard weight 16 gauge auto-5 shotgun was made in Belgium in the year 1947.
The H prefix to your serial number indicates that your browning standard weight auto-5 shotgun was made by FN of belguim for browning in 1954.
Your Browning standard weight model auto-5 shotgun was made in the year 1954 with the serial number that you have provided.
Your serial number indicates that you have a standard weight Browning auto-5 shotgun that was made in the year 1958.
Your serial number indicates that your Browning standard weight auto-5 shotgun was made in the year 1952.
Your serial number indicates that you have a Browning auto-5 standard shotgun in 16 gauge,that was made in the year 1953.
With the serial number that you provided,you have a browning auto-5 standard weight shotgun that was made by FN of belguim for browning in 1955.
Your serial number prefix of 0R which is read zero R indicates that you have a Browning auto-5 standard model 16 gauge shotgun,which was made in the year 1960.
47571.With the prefix of 1M to your serial number;this indicates that you have a Browning standard weight auto-5 shotgun which was made in the year 1961.
With the serial number that you have provided,your Browning standard weight auto-5 shotgun was made in the year 1957.