The one other state of affairs which i can envision is the fact that it may be a normal Model 70 barrel and action with a substitute XTR stock. This really is not likely although...I suspect that it is as you describe, an unmarked XTR. The bottom window is closed https://martinljhdb.p2blogs.com/26374347/the-fact-about-model-70-featherweight-that-no-one-is-suggesting