They didn't start building the Remlins in NY until 2010. The buy out was in 2007, with the first plant closure in 2008, followed by the North Haven plant closure in 2010. The Leverguns were built in North Haven, typically.

So you have a Marlin built Marlin. The proof stamp may look like a small ding - but it should have something on the left hand side (looking from the buttstock) - off ejection side, a few inches down from the receiver.