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Your Browning auto-5 magnum shotgun was made in the year 1960.
Not made.
1968
This gun was made in 1962
You will have to call Ruger to find out.
Your serial number indicates that it was made in the year 1973.
See related link.
You will have to call Browning with the sn to find out.
The 2 letters RR in the serial number indicate that your Browning auto-5 magnum shotgun was made in the year 1977.Being that your Browning was made in the year 1977,it was manufactured by Miroku of Japan.this began in the year 1976.
250
Answer 1958 - It was the first year of the 12ga Magnum.
There is no S&W with that Model number.