Rib matting and cut barrels

[J.B. Books]

Originally Posted by David Noble

Typically the rib matting will terminate just shy of the barrel end and may or may not have a perpendicular cut-off line. I've heard that is not always the case but am wondering just how common it is for the lines to run right off the end of the rib? I just received my latest purchase, a CHE 12 damascus gun which shows in the book as having 30" barrels. The barrels measure exactly
30" but the wavy lines do not stop short of the end.
Here's a picture. What say you?

Have you measured the length of the choke taper? If the book and gun agree and the choke taper is 3 1/2 to 4 inches long I would say they are original length.