Impossible to answer without the serial number.
1951-1952.
Serial number
Impossible to answer without the serial number.
H&R made utility firearms from @1864-1986; 50-125 USD.
20-100 USD or so
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.
50s to 80s
Unfortunately, without the serial number, we can't date your revolver. Without knowing the condition, we cannot estimate the value.
Need serial number.
25-100 dollars
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