Hi Norman - Salam Alaykum Ibrahim
Thanks to have given your opinions 
 
about age, I have no illusion, 
the "Qajar dynasty"  was stopped in 1925, that means  ± 87 years ...
so the last "Qajar" is so to speak, contemporary  
 
at least, since the beginning this point for me it's clear, 
it's a modern/ancient khanjar  
 
all the best
à +
Dom