So, disregard all above. I bought the gun off of an on-line auction site. Needless to say, their description was way off, to say the least. Turns out, the inscription says, J STEVENS & CO CHICOPEE FALLS MASS PAT SEPT 6 1864. Now the question is what model is it, assuming it even has a model designation. It is a single-shot, break-action 12 gauge shotgun; it has a fishbelly stock; and it has no forend, by design. The break-action release is a knob on the left side of the gun. The knob pushes left to right with the locking protruding out on the right side of the gun.