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Manufacturer Answer
Thank you for reaching out. Our Winchester Model 70 rails were designed to fit Post-64 Model 70 actions. While they may fit some Pre-64 actions, we cannot guarantee fitment based on variances from that period. You can verify the screw hole spacing that would match this rail - both front and rear being 0.860" apart (center to center). I hope this helps, please reach out to us if you have any additional questions.