Left side of rifle has following markings; 86892 (I assume SN). It again has 86892 7,6S (I picked up somewhere 7,6S is metric for.30-06). Other markings US 1906. Then what I assume is a standard manufacture marking Waffenfabrik Mauser Oberndorf A/N. With the exception of various proof markings there is not much else. Any additional information you can provide or confirm would be greatly appreciated.