This factory manufactured buttplate measures 4 7/8 " long by 1 9/16 " wide and is for the Iver Johnson Sporting Goods Co. Knox - All hammerless double shotgun in 12 gauge and is in good condition with moderate wear. This buttplate has been shortened slightly in length by a previous owner. (file photo)
Note: Iver Johnson shotguns with the following serial numbers have been observed with this part: 184436