We do not collect any own facts and we do not provide any of the data to third-party products and services. It was provided from about 1959-1963. Yet another defining characteristic in the JTSS could it be came by using a Winchester 93B front sight which resembles a shark fin. https://highimpactrounds.com/product/winchester-super-x-20-ga-2-75-in-8-7-8-oz-1210-fps-25-rd-box/