The proper magazine would be a type 2 Army magazine. Which is slant cut on the bottom of a blued magazine tube with an aluminum bottom and it would have an stick wing Eagle over the number 63 or the eagle over the number 83 or Eagle over 655. The one you have is a type 4 Army Magazine used in 1941 and 1942 byf Lugers made also by Mauser. A type 2 would look like this one.