Buttplate early Marlin model 39. It is smaller than the standard marlin 39 buttplate. Dimensions are Length 4.5 inches; 1 3/8 inches wide; from top of plate to mid of top screw hole 1/2 inch; middle of bottom screw hole to Forearm of plate is 1 3/16 inches. Center to center measurement of the screw holes (from center of holes) is 2 7/8 inches. use screws wp69.