We must see the gun in order to date the lock, since the lock is a commercial item and can only be dated in very general terms depending on its shape and style. If you could post photos of the front and back sides of the gun, showing from the butt plate up to about 8 to 10 inches past the lock plate area, we should be able to help you get a pretty good date on your rifle. I specifically collect and research guns made in Kentucky, so a couple of pictures would go a long way in determing the approximate date of your rifle, and therefore your lock plate. Shelby Gallien