I have a N.R Davis and Sons "A-JAX" side-by-side 12ga. This was my great-grampas gun so it is pretty old. I'm in my late teens lo it is not like it's really that old. It is in really good shape exept for the forearm is pretty shakey but not like it's gonna fall off. Can you tell me about the company, how much it is worth, and when they were produced.