1970
The 2 letters found in your serial number(MZ) indicate that your Browning safari was made in the year 2001.
You will have to call Browning or visit their website with the sn.
The prefix of L70 indicates that your Browning safari bolt action rifle was made in the year 1970.
The prefix of L70 indicates that your Browning safari bolt action rifle was made in the year 1970.
2000
With the 5L prefix to your serial number indicates that your Browning model safari bolt action rifle was produced by FN of belguim for Browning in 1965.
With the serial number that you supplied,your Browning Safari bolt action rifle was produced by FN of Belguim for Browning in the year 1963.
1969
1969
1994
1969
Go to Proofhouse.com and search the Browning serial number tables.