For more information about this process, see Disarming Prohibited Persons in New Jersey.
For general information on the background check process and categories of prohibited purchasers or possessors, see the New Jersey Background Checks and New Jersey Prohibited Purchasers Generally sections.
The second letter of the date code is as follows: F = 1962G = 1963H = 1964I = 1965J = 1966K = 1967L = 1968So a date code of "JK" would indicate that rifle was made in October of 1967. Straight stock, 21 ½ inch barrel, 40 ½ inch over-all. If you give us that letter we'll be able to tell you the year it was made. Perhaps there is some obscure marking that is near impossible to find – like markings on Waterford crystal, but I see nothing else.
No other identification can be found other than the Marlin insignia Doesn't seem to fit into the date codes above. There will be a letter before the serial number that will probably be between "M" and "S"" in the alphabet.
What would be the date of manufacture for a "Marlin Model 336SC CAL.219 Zipper Micro Groove" On the side of the barrel just in front of the receiver is a "JM" enclosed within an ellipse.
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