I once owned a Standard Modell and sold it off in a fit of stupidity. I have been looking for a replacement ever since. That is a lovey rifle, OP.
Correct me someone if I am wrong, but the Standard Modells were made in between the war as "sporting guns" to fly under Germany's rearmament restrictions. Very similar to a K98, with the exception of a straight bolt (some were bent) and no military cartouches. Presumably produced for export but able to be repurposed for military use within Germany. They are typically seen with fingergrooved stocks and beautiful blued finishes.