As stated in post #6 above, it is marked "Model 12." I asked Lisa at SSS about using the action screw spacing as a determining factor as I would with other rifles but she said that magazine length is the usual method with Savages.

I was at my local club shooting it this morning and a Savage owner agreed with my assumption that it is a long-action receiver with a short-action magazine. He told me he had seen one other one like that years ago - a blued Model 10 or 11 - but couldn't recall the caliber.

Ed