A very nice rifle! I say it is 8MM Mauser because it chambers that round. I can not verify that is the correct ammunition. I have never fired it. The ONLY marking on this rifle is "1933" which is located at the junction of the barrel and the chamber. I can find nothing to indicate the manufacturer. It is obviously a high dollar rifle of some vintage. My father-in-law (deceased) had it for at least 60 years. Only $600 cash. Located in Cicero, just north of Indy.