How heavy, thick is the blade? It is difficult to see the cutting edge from your picture with so much surface rust to be confident about age, I susspect pre ww2. If it is a nice cutting type of blade then I can see nothing a miss about it. Some people say that if it has black hair decoration then it is older than the ones with red hair, personally I do not believe this. Yours certainly has the appearance of some age hopefully it is a good blade. They are still in use in some parts. I have a few picture of {Burma} Naga with working doa I will post.
This is helpful.
http://www.vikingsword.com/vb/showth...t=naga+weapons
The quality of the blade may mark it out as a weapon or more modern festival piece.