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Its not a kukri,the spine isnt of kukri origin as the spine curves, its not flat backed. I have no ""official"" source for this but the design is actually modelled on the golok as carried by the australians around the time of the vietnam war. British model MA65..
http://i252.photobucket.com/albums/hh19/politicalanimalau/machete.jpg the TF2 melee weapon of the sniper
http://www.wellingtonsurplus.com.au/images/l/MA0013.jpg - the golok"