Hatchet find

[robtx38]

I found this hatchet at a yard sale today. I'm not sure what it was designed for. I'm not sure of the holes on the head? There isnt any markings on the blade. I paid $1 for it, so if it isn't worth anything I'll keep it for myself? Rob

[diggummup]

It's a shingling hatchet. The inner blade has a draw knife for shaving shakes. It has three-hole gauges to space the length of shingle exposed to the weather. Here is a similar-