I picked this up yesterday, along with a bunch of other random stuff. Some knives, ammo, ammo cans, other cans, etc.
But this is really nice, is still slathered with cosmoline and looks to be unfired. 7mm. The barrel looked toasted but after a quick cleaning is like a mirror. Just old cosmoline in the bore.
The staining on the receiver is dried cosmoline and after clicking these pics it came off with some solvent on a rag.