Hi Paul. Guess your definition as correct would depend on how you define "regular style". If such inclusive of "full stock" Oberndorf Sporters, both models "M" and "S", to fit. If "regular style, as to me implying "half stock", then wrong. Between the "M" and "S", the mentioned metal cap on the "M" and simply wood terminating proximate with muzzle on the "S" model. Metal, a principal difference in the bolt handles. The "M" with the flat, so-called "spoon" handle. The "S" model the traditional - same as all other Oberndorf Sporter round handle. That said, all such more of a pear shape knob than round ball terminus. Below, few photos of my "M" Model, about the same time period as the O/P gun as mine SN 87 K range. In original 30-06 for the American market. Your question is good and timely. A lot of confusion between the "M" and "S" models. The "S" dating from early in the twentieth century. The "M" dating from eve of Great War, 1914. Best! John
