Curl,
Yours is a beautiful DR, a perfect unity of function and form, as a matter of fact one of the nicest Continental rifles I've seen; my sincere congratulations.
9.3x74R came out in the early 1900s so rifles chambered for it were not realy rare in pre-WWI Europe, but they were quite uncommon compared to 9.3x72R (which was to the Cenral European hunter roughly the same as .30-30W in the US, as far as popularity was concerned).
With kind regards,
Jani