The Tula factory stamp/marking is a Star with arrow inside. His rifle is a Izhevsk Arsenal rifle. Izhevsk SKS's (arrow inside a triangle) are considered the rarest of all the Russians since they were only made from late 1953 through 1954.
And a very nice example too!
Your rifle likely is an arsenal rebuild (since it is in really good condition), check and see if it has a stamped square box with diagonal slash, or small diamond with slash on top of receiver cover or side of the receiver. In your photo of the factory markings looks like an arsenal rebuild stamp above the factory stamp but I can't see it clearly enough to be sure.
Great piece of history and fun shooters also.