C96 question - safety lever

[alvin]

It's interesting to see 4 rifling lines, and so deep. Original Mauser rifling is supposed to be 6 lines. Earlier barrel (before 1910?) has 4 lines, but those barrel also has much steeper barrel neck. I assume it has a liner inside, Quality of work is as high as Walther P-1's liner -- regular workshop could not do so good.