Izhevsk made, that's what the Triangle with the arrow in it is, that's Izzy's factory mark. Tula was the other factory, the original one actually, as TT stands for Tula Tokarev, and that arsenal mark is a star, sometimes also seen with an arrow in it.
That's one of the later models, towards the end of the production run, in the mid-late '50s they switched over to the Makarov PM as their primary sidearm. They're all basically the same, though, but this one is from near the end of their production life.