This blade is quite similar to another I used to see in one of the outdoor products/military/tactica l (and wannabe) catalogs -- just wish I could remember which one. But that was a long time ago in a life that's now far, far away...
IIRC, they called it an "African Bush Knife" and made much of the idea that the hollow handle was of great assistance in converting it to a spear.
Of course, the "African Bush Knife" had a drop-point configuration instead of the squared-off configuration seen in the subject of this thread.
I'd not be wanting to hold this thing in my bare hand when whacking into anything substantial. There's a good reason why hammers have shock-absorbing handles, ya know...
Hoping this helps a bit.
Edited by Daniel Nighteyes on 03-01-12 05:25.58. Reason for edit: No reason given.