I've heard it referred to as....

by Glen, Saturday, February 21, 2015, 17:18 (3567 days ago) @ Hoot

...1st Generation, 2nd Generation and 3rd Generation Newtons (with the 3rd Generation Newtons being the Buffalo Newtons). The first two generations were when Newton started his business in 1914, and then after he ran it into bankruptcy and pulled it back out (1918?). I've owned two Newtons over the years, both first generation guns (right at the end of the first generation, both 2xxx serial numbers), one magnum length action and one standard. The magnum length action had been rebarrelled back the 50s to a .25/.30 Newton (basically a .257 Weatherby Magnum without the belt or radiused shoulder). I gave that gun to a dear friend of mine as a birthday present. He has a .30 Newton reamer and was going to make his dream elk rifle with it. The other gun is a .256 Newton that I still own. This is one of the coolest rifles I own. The barrel is shot out, but I just can't bring myself to re-barrel it