The one other scenario that I can visualize is that it may be an ordinary Model 70 barrel and action using a substitution XTR stock. That is unlikely although...I think that it is while you describe, an unmarked XTR. Layout and enhancements: Building on the accomplishment with the Model 54, https://gregoryrfnwg.mybloglicious.com/47999724/winchester-model-70-pre-64-featherweight-review-an-overview