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Your serial number indicates that you have a Browning BAR that was made in the year 1973 with the suffix of M73 after the serial number.
50-300 usd
Markings, serial number and features.
100-300 USD
50-650 usd
The M69 suffix identifies your 300 win mag as being a browning BAR that was made in 1969.
This is really a Stevens / not Browning. These usually sell for $125-$300 depending on condition
50-300 usd
That is not a Browning serial number. The 1958-1968 Browning dating system was of the format: <last digit of year of manufacture><letter indicating grade><serial number> An example would be 8L12345. 8 = year (duplicated between 1958 and 1968) L = Safari grade 12345 = serial number John
Your serial number suffix of M72 indicates that your rifle was made in the year 1972.
Made in 2000. 300-500 USD or so
42 years; 300 USD