Perhaps more of a derivation of the Mak, but this is another piece that came to mind when thinking about the Sithabahu Sword
http://www.arscives.com/historysteel....swordlist.htm
267
Short pole arm. Northern Thailand. Late 19th Century.
Heavy blade with inserted hardened edge, and brass inserts along the spine of the blade and on each face. Inscribed line decorations on the blade typical of North Thai or Lao work. Handle is bamboo with metal ferrule. No scabbard.
Overall length: 75.5 cm
Blade length: 24 cm
Handle length: 51.5 cm