Our friend's first gun (is it a $200 grade?) does indeed have Herringbone barrels, also called Lutticher (Liege) "Toncin", but they are damascus and not Laminated Steel.
Most examples are found on Lindner Daly's, but the pattern was also used on high grade Smiths and Lefevers
http://www.picturetrail.com/sfx/album/view/20948056
The second gun has Laminated Steel barrels
Long version
http://docs.google.com/a/damascuskno...mx7_52fs85cfgt
Short version
Laminated Steel differs from Damascus in that:
1. Laminated Steel has a higher steel to iron ratio, with higher quality steel.
2. Laminated Steel starts with the iron and steel mixed together (puddled) in a semi-molten state (the bloom) which is then hammered or rolled into rods. Damascus starts with individual strips of iron and steel.
3. Laminated Steel rods are twisted less than Damascus.
4. Laminated Steel rods may be subjected to additional rolling or hammering.
Threaded Mode