I had one very similar to this. Two deep groove rifling with one turn in thirty inches. It takes a belted ball. Very accurate. Mine was marked to the British infantry at Fort Wellington in Prescott. I can tell you that, as long as it is not the Nepalese stuff, it is worth a few bucks. I sold mine to a shooter in England for just shy of $7,000.00. Original Bakers in good shape are worth much more. Dave