In recent years the market has been literally flooded by Luristan and Warring States bronze artifacts, with the vast majority being fakes. Some of the fakes can be spotted easily, while others can fool even the most experienced experts and require specialized laboratory testing. That's why I am highly suspicious when I see any of these artifacts.
And the fact you didn't receive any replies so far seems to suggest there might be others who share my suspicions.
But I am sure you already know all this.
PS: Other than that, the axe looks really cool.