When I was a member of the USMCR Rifle Team back in the '60's, that kind of case is what we carried our National Match M1's and M14's in. Also, when I bought three match rifles, two bolt guns and an M1, from a former Marine Corps team shooter, that's what they came in. I still have them and there is a certain amount of sentimental attachment involved with them.
Yours has seem some hard use and was not treated too kindly. I have no idea what it might be worth, but there are collectors who go for Marine Corps memorabilia, and they would be a potential market. Maybe one will see your post and contact you.
