This rifle was proofed at the Suhl proofhouse in 1912 as the bore/land (notgroove/bullet!)diameter is marked as 7.8 mm, but the service load info is still given as 2.75 gramm smokeless rifle powder and a steel jacketed bullet. The CROWN + crown/N marks indicate proof using the 4000 atm special proof powder, according to the proof rule of July 23, 1893. The rifle was proofed only once for the 8x57 I cartridge. As it is rebored to 9x57, it lacks the mandatory reproof . So the reboring was probably done about 1920, when the „military“ 8x57 was prohibited and proofhouses were not operating due to revolutionary turmoil.
As the worker’s marks under the receiver show, the action is a Gewehr 98 one of military production, smuggled out of the Erfurt arsenal. A „grey market“ action, sometimes encountered at that time.
The crudely scratched name on the barrel is probably of a former owner. No reputable gunmaker would have signed his gun with such scribbling.
The rifle was once mounted with claw mounts. As the scope was not „liberated“ too in 1945, the now useless bases were removed and the front base dovetail in the receiver ring filled in.