3 1/2" Rev War 6pdr Cannon Ball purchased in the 1970's from a digger visiting Gettysburg to sell items he had found. Has a great seam and sprue mark from manufacturing. It is unmarked and purchased as a find from Fort Washington area . I have bar shot that came from the same digger and it has 1922 Ft Washington on it . I have no reason to doubt this info as he had a trunk load of relics ! I am selling some of my pieces as there is just to many and I still do buy ! Most of the items that I will and have been selling have been purchased many years ago.