The sole other situation which i can imagine is the fact that it may be a standard Model 70 barrel and action having a alternative XTR stock. That is unlikely nevertheless...I think that it is when you describe, an unmarked XTR. This extractor has drawn lots of flack over time, https://winchester-model-70-feath56642.thenerdsblog.com/32300527/the-smart-trick-of-winchester-70-featherweight-for-sale-that-no-one-is-discussing