These were designed and made at the request of a local gunsmith on behalf of the owner of an early model Kimber 84. It turns out Kimber changed the mounting screw hole location for the optics rail on top of the receiver at some point.
These fit early production Kimber Model 84 short action rifles.
If you’re not sure if this rail will fit your rifle, you can compare the dimensions of the mounting holes on your rifle to the dimensions here. Note that the rear holes on the mount are slightly elongated to account for small variances in manufacturing between rifles.