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.
The Browning website has a page enabling you to find your shotgun's age, but you have to know the type of shotgun you own. Go to the page, then click on the type of shotgun it is - there are 15 types - and then reading the page for that gun's serial numbers. Look for the series of serial numbers that includes the one you are interested in: #48162.
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.
I would need the type of browning shotgun you are asking about,and a serial number which you did not provide.
What is the value of a 12 gauge Browning shotgun serial J68824?
wondering price value of browning shotgun serial number 35354
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.
You have a Browning auto-5 standard model shotgun in 16 gauge that was made in the year 1949.
Browning never used the letter B prefix for any of there shotguns serial numbers.
With the serial number that you have provided,your Browning standard weight auto-5 shotgun was made in the year 1957.