Again, guessing, the one on the left looks alot like a Nesika Model T. The finish looks about like how they did coming straight out of the heat treat oven. Its tough to tell, but it appears as though some of the machine work was done "post heat" which was how we did them. The lighting/photo doesn't make this really conclusive though. The wider tang edge is a dead give away that it isn't a Remington. It's close, but certainly broader. I say a hunter series Nesika. Either a T or a K.
Don't see to many of those anymore other than my personal stash.
Cool chit.