What does the SJG on the top of the receiver on a mauser 1895 mean?

The "SJG" marking on the top of the receiver of a Mauser 1895 typically signifies the initials of the inspector or proof house responsible for overseeing the firearm's quality and compliance with military standards. These markings were common on military rifles to denote approval after testing and inspection. Specific interpretations can vary based on the country of origin and the context in which the rifle was produced.