The only other circumstance that I can visualize is always that it could be a standard Model 70 barrel and motion which has a replacement XTR stock. This is often unlikely however...I suspect that it is as you explain, an unmarked XTR. Design and enhancements: Setting up on the achievements https://winchester-model-70-pre-655559.snack-blog.com/26763895/the-greatest-guide-to-win-70-featherweight