This is a really nice Swiss, but the magazine puzzles me. I admit that Mauser production is totally out of my experience, so perhaps I am out in left field on the following observations. It appears that the "flat" portions of the magazine base are sanded parallel to the sides (dark green lines), but the center section appears devoid of sanding marks or if they are present appear to be at a slight angle (light green lines). Could be an effect of the lighting. Also the outside portions of the curved section appear as though there has been more metal removed than the center part, hence the wedge shape of the center section (blue lines) and a pronounced radius at the outside edge (red lines). This does not seem consistent with continuous sanding of the bottom of the base against a flat sanding surface. I would think that all lines should be parallel and square, i.e. the blue lines should be parallel to the yellow lines and the light and dark green lines would be parallel to each other and at right angles to the yellow lines. If I were to be suspicious, I would think that possibly the "v" suffix was preserved but the center section was resurfaced and the number restamped, but as I said, I don't know enough about the subject to be suspicious.