Excellent detective work Stu.
As you say, the traditional form of Jerz axes is very different from my axes.
The Hadhramaut axe pictured shows definate similarites. It would be interesting to see if we could find other examples to clarify if they all have the asymetric downward curve.
These are indeed an interesting type. I don't think I've ever come across an axe that has both the full crescent blade and the downward curve.
This has turned into a very interesting and enlightening, if somewhat frustrating search for me! And from the amount of views, I suspect that others are interested too, so come on you lurkers!!
Best
Gene