What most people refer to as the “Model 70 Buttplate” is a common one found on custom sporters. There is another one a little larger that at first glance looks identical to the “70” one but is a little larger. I believe that these were used on Winchester 1897 Shotguns and some 86 Winchester, but I don’t know for sure. What I’m trying to learn is how late the larger one was used or sold by Winchester?
Model 70 Type,

Early Type,

MP Sadly Deceased as of 2/17/2014