Oh onelast thing does anyone have a example I cam see of what the guard on the Thai dha looks like as opposed to the Burmese guard. and if mine is Burmese as opposed to Thai. here is a link to a piece Artzi identified as probably Thai but the handle is different than mine and one with a similer hilt from Burma but the blade is different.
http://www.oriental-arms.com/item.php?id=1988
http://www.oriental-arms.com/item.php?id=116
Mark...