This factory manufactured firing pin screw is for the Iver Johnson Sporting Goods Co. Knox All hammerless double shotgun in 12 gauge and is in very good condition exhibiting a grayish brown patina with some slot wear. (file photo)
Note: Iver Johnson shotguns with the following serial numbers have been observed with this part:
12 gauge: 94632, 184436 & 190946
20 gauge: 75043
