This chevron pattern is named "Roman" and was designed by Joseph Said.
I have noticed it comes in two forms - one with the silver salt decor on the surface and the other where it is cased. This looks like a cased one and I like the cased ones much better - the colours are much more subtle and you get those lovely ochre surrounded bubbles. Has it got silver deposit trails on the outside? My favourite one does.
I have seen this shape before. Once. It just had the traditional design of a vertical streak of silver salt decor, subsequently spread around the vessel.