1951
No way of knowing without you providing a serial number to find the year of production of your Marlin model 39A.
The letter K prefix to the serial number puts the year of production of your Marlin rifle as 1953.
The AC prefix dates your marlin model 39A to the year 1967.
your marlin 39A was made in 1965.
Your marlin model 39a was made in 1965.
The L prefix to your marlin model 39A indicates that it was made by marlin in 1954.
With the serial number provided,your Marlin model 39 could be a first year production rifle,which would be in the year 1939.
The S prefix dates your marlin model 39a to the years 1958-1959.
The letters AA identify the year of manufacture of your Marlin 39A golden Mountie as 1965.
Your serial number indicates that your Marlin model 39A was made in the year 1981.
The H prefix to your serial number indicates that your Marlin model 39A was made in the year 1951.
With the serial number that you provided,your Marlin model golden 39A was produced in the year 1964.