Very nice tuareg telek dagger Rockelk, with a nice blade as well. The South Algeria attribution is supported by an example in the Quai Branly Museum, which Iain found sometime ago, and also by Tristan Arbousse Bastide - link to a thread below, where Tim Simmons uploaded some scans from Arbousse Bastide's book:
http://vikingsword.com/vb/showthread.php?t=22555