Here is the post made back in 2002 when I finished Mark's Artillery. He lives in Virginia I think. The small parts look like "79" but the SN digits are 2263 g from my records.
http://forum.lugerforum.com/showthre...ht=1914+Erfurt
I have worked on (7) 1914 Erfurts 1327a, 5519a, 1005b, 2263g, 1946 NS, 4324 NS (Double date 1914/1920), 9259 NS NS=No letter suffix