The Musandam Axe. The Jerrs Axe.

[LJ]

This is very interesting, and set me off thinking (not least ... thinking about how to get a copy of that book !).
This axe head had me puzzled, and I put it down as being from India, but could it in fact be from Oman ? The flaring shape of the cutting end is very different from the examples you illustrate, but the decoration seems to be quite similar.