You have a Mauser 98 made by Erfurter Maschinenfabriken in Erfurt, Thuringia. Founded about 1922 or 1924, they made a lot of weapons, including submachine guns and rifles. When WW 2 end the owner was arrested for war crimes. Erfurt was in the Soviet zone- they hauled the factory off. Owner resumed business in about 1949 in the US sector- think they are gone now.