50s to 80s
Impossible to answer without the serial number.
1951-1952.
H&R made utility firearms from @1864-1986; 50-125 USD.
Need serial number.
The Letter M prefix to your serial number indicate that you have a H&R model 922 4th model which was made from 1949-1952.The letter M was the last letter used,so I would assume 1951-1952.
Serial number
The letter prefix of L ahead of the serial number indicates that your H&R model 922 was made in the year 1952.
About 1946
Impossible to answer without the serial number.
am prefix is 1974
20-100 USD or so
The letter c prefix to your serial number indicates that your H&R model 922 was made in the year 1942.