My guess is it's a sporterized Mauser in 7 X 57mm Mauser.The country it was sold to should've been on the top front of the reciever but the front scope mount has it covered. If you remove the fromt scope mount there may be enough writing left to see which country it was made for. Then again maybe not. My guess is South American ( Bloivian, Chilean, etc.) Then again I could be waaaay off!!
Have it checked by a qualitied gunsmith to make sure of the caliber and headspacing and if it's ok .....shoot it!