This factory manufactured long variation buttplate screw is for the Iver Johnson Sporting Goods Co. Knox All hammerless double shotgun in 12 & 20 gauge and is in very good condition exhibiting a grayish brown patina with light wear. (file photo)
Note: Iver Johnson shotguns with the following serial numbers have been observed with this part:
12 gauge: 94632
20 gauge: 75043
