My old mauser is a "parts gun" of mismatched serial numbers. But the barrel extension has a s/n of 6xx, and the frame has a s/n of 58,xxx. My guess is the top half was made in 1897 and the bottom half in 1905.
The springs have been replaced, barrel re-liined, and overall it is a tight piece with no visible problems. About 15 years ago I bought the gun, which was in poor condition, as a project. Now that it is done I'll have post some photos of how it turned out. Of course, I need to shot it as well!
Do you really think the new manufactured S&B 7.62x25 Tokarev ammo will be safe?