I’ve been wanting a Marlin ever since I saw one in a movie. Found this 336y in gunsmiths shop by chance. SN starts with 16 so... 1984 right? I tried bargaining with the man but he wouldn’t budge on the price... curious as what would you guys pay for this.
The ATF gave Remington/Freedom Group/Marlin permission to use the North Haven rollstamp on the barrel from the move in 2010 through to the end of 2011 and even into 2012 on some models. So the rifle in question was made sometime after Summer 2010 and Mid-2012. I personally own an 1894 date stamped May 2012. It has a North Haven marked barrel, a KG date code, and an MRxxxxxC serial number on the left side receiver.
The date code, left rear of barrel will positively date production, although Rem/Marlin missed a few. The OP needs to post a pic of the receiver left side, and the left rear of barrel.