Considering the purchase of the Umnumzaan. The blade shape is particularly interesting. I was hoping for help from current owners about the top edge. In pics I've seen the first section of the tip (swedge area) appears to be sharpened. Is this an illusion or is this knife double-edged on the tip? I have yet to see one first hand, only Sebenza's, so your help in this is appreciated. Thanks in advance