If you see my post above and the reply from the o.p. you will note that this is a heavily (and beautifully done) modified/customized Cold Steel brand "Rifleman's 'Hawk."
The "bowl" is solid, more of a pipe bowl shaped hammer.
Brokennock, Your almost right. It isn't Cold Steel's "Rifleman's Hawk". It is their "Pipe Hawk". The bowl is solid and it is actually a hammer pole hawk. The shape of the hammer pole is like a pipe bowl but is solid.
I do not modify these for throwing. There are better hawks designed for throwing. The ones I do are fully functional as a camp tool, as a formidable weapon for self-defense, or simply display. I have used mine to aid in the dressing of game I have taken and around camp and display. I am sort of a collector.