This factory manufactured rear lockplate screw is for the Iver Johnson Sporting Goods Co. Knox-All double hammerless shotgun in 12 gauge and travels from the left side lockplate through the wrist and attaches to the threads on the right side lockplate. This lockplate screw is in very good condition exhibiting a grayish brown patina with light slot wear.  (file photo)

Note: Iver Johnson shotguns with the following serial numbers have been observed with this part:

12 gauge: 94632.

20 gauge: 75043