i think the scabbard depends on the available local materials. i suspect the woven ones are more thai. most of the locally made ones i've seen were wood. the original fancy one above was wood, and the smith faithfully reproduced the horn handle, then made a horn scabbard for it.
as these were made for ages, and are still made much the same way, and are meant to be and are used hard, i would not hazard a guess at age. i suspect older ones would have been resharpened so many times they'd be rather thinner in profile, unless of course some foreign collector like us obtained it a long time ago & put it up nicely oiled and unused. so it could be anywhere from a few years old to a couple centuries.
