The K prefix to your serial number puts the year of manufacture in 1953.
Your marlin model 39a golden was made by marlin in 1964.
1953
Your marlin model 39A was made by the marlin firearms company in 1952.
1955
The letter D prefix to your serial number,dates your Marlin model 39A to the year 1947.
The letter U prefix to your serial number indicates that your Marlin golden 39A was made between 1960-august of 1961.
The letter V prefix to your serial number indicates that Marlin made your model 39a between Jan 1961-Aug.1962.
my marlin 39a 18496b
For most 39A, you can call Marlin's Customer Service, 800-544-8892. They handle parts and repairs. This all depends on the age of the gun (which is determined by the serial number). Parts may not be available, if gun is too old. They have some referrals to companies that may have parts for the older guns.
Made in 1965, An excellent rifle. My grandchildren are shooting the one my mother bought my dad as an anniversary present years ago.
Need serial #
Your Marlin model 30AS was made by Marlin in the year 1995 with the serial number that you provided.