Note this from the other thread:

"G.C.Dornheim's D.R.G.M. 223532 for the 8.15X40R dates to 1904 while Vierordt's DRGM 274380 for the 8x62R should date to say 1906 as would the Kersten Modell I under D.R.G.M. 252511. So Gebrauchsmuster 242486 would date to circa 1905(just some ground truth and not related other than a date, Ernst Steigleder sought protection under DRGM Nr. 232449 on July 20th 1904 for a breech-block mechanism). So a date range for this drilling is 1905 - 1908."

Maybe the owner that found protection ponied up the additional 60 marks for an additional 3 years of protection putting the period to 1910 or 1911 which would pair well with the applied marks.

Kind Regards,

Raimey
rse