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					Originally Posted by Tim Simmons  Has the look of a converted  bayonet?  Perhaps fashioned  Ww1 East Africa by the look of the scabbard. | 
	
 Certainly a South American knife by design and dress... the exact name of the type eludes me at this moment.... there is a more specific form this hilt type is related to...
A similar sheath is seen within this article on the forum, others readily seen on google images.
http://www.vikingsword.com/ethsword/facon/criollo.html
Is Chris about, he'll nail it down pretty quickly.
Edit; Found the name I was looking for, Sorocaban, as was mentioned above by AHite.
The etymology section is interesting.
https://en.wikipedia.org/wiki/Sorocaban_knife