It was not a manufacturing facility situation for that model. Probably Imaginative crafting of a standard inventory. Pics would help to find out the appx yr your rifle was built. 44 It was provided from about 1959-1963. An additional defining characteristic from the JTSS is it came with a Winchester https://highimpactrounds.com/product/winchester-target-7-62x39-123-gr-fmj-2355-fps-20-rd-box/