Nice rifle - large ring 98 action and looks complete and in excellent shape. I expect it's an 8x57? I like that trigger guard better than the more common type which is a separate piece, larger and more ornate, more like on a shotgun.
Could have been made by any of a thousand out of work gunsmiths sprinkled all over Germany in dozens of small highly competent shops after the war. But as Igorrock said, take the stock off and look for more markings. I don't know what the eagle on the receiver ring means - maybe someone on the German rifle forum can help you if noone here knows.
