Hello Canbrit,
welcome to the forum, good to have another woman as member!
Your sword isn't from Vietnam but from Thailand, called dha or daab and maybe a Vietnam war bringback from an US soldier. The sword is very recent, i.e. from the 70ties last century. Here is a link to an older thread about this sort of dha:
http://www.vikingsword.com/vb/showth...hlight=vietnam
There is mentioned from Andrew also an old thread written from Ian but I can't find it in the moment.
Best regards,
Detlef