Remington 1917 Norma Mag 308
I am considering purchasing a rifle but the seller doesn't seem to know much about it. The barrel is marked Remington Model of 1917 just just in front of the chamber and on the barrel it's marked 308 Norma Mag. I tried to look it up a few different places but everything I've found said that rifle should be a 30-06. What is it and what would it be worth in fairly good condition?