Lancaster postet the following rifle in the "mauser rifles at auction" thread on 19.03.16.:

Would that barrel shape be an authentic option for my rifle ? That rifle would come to auction in Munich the next ten days. I could visit the auction house for a pre auction check of the measurements. But is that barrel shown on picture an original one ? In case the Barrel data would not comply with my Action an stock would it perform as sample for a barrel maker ?