Tribal dagger - any idea of origin, age , background?
 

This dagger was picked up many decades ago on an overseas trip through the middle-east by my parents (afghanistan?) (see photo's). I'm not sure of its precise origin however it looks tribal and I'm curious about an apparent star of david near the hilt (could be just a co-incidental tribal motif). The blade itself is old, there has been some more recent attempts to create a new handle and brass fittings. Just wondering if anyone has any ideas on age and origins of the dagger?