Classic square oval shape, used on percussion English rifles and shotguns of the 1830-1880 period. Notice that English buttplates have a "hook" under the front comb. It hooks under the edge of a wood screw, concealed in the inletting.
Available in wax cast steel and brass.
Overall length 5-1/8", width 1-3/4", comb is 4-1/16".