That is interesting. I have seen both of the patterns on the barrel on Tibetan weapons including a matchlock. I don't know about formal names for the patters, but the chevron design on this barrel is not made in the usual double row of twist core. It is made with rod(s) bent into a continuous herringbone pattern. Here is an example from a Tibetan dagger (
http://s77.photobucket.com/albums/j6...t=9f614c7d.jpg).
Is this style of pattern welding along with the "jelly role" pattern usual on Indian weapons, or would this be evidence of Tibetan techniques?
Josh