This factory manufactured checkered walnut fore-end assembly - third variation is for the Iver Johnson Sporting Goods Co. Knox-All double shotgun in 12 gauge and is in very good condition with light dings and handling marks. The third variation is slightly longer in length than the 2nd variation. It is approx. 1/8" shorter than the first variation. (file photo)

Note: Iver Johnson shotguns with the following serial numbers have been observed with this part: 184436