It is a new version BladeTech "Tek Lok".
I finally got it mounted ... but the only way I can see to mount the knife vertically is to use two screws on the same side, and another pin (no screw) to hold a rubber buffer in place in order to keep the knife from canting. You cant use a screw on a pin that has a buffer on it, because the included screws are too short to go through both the spacer and the sheath.
This is not my first Tek Lok. The shape of the sheath and the unevenly spaced mounting holes used on it severely limit the mounting options, and there are no instructions or pictures included with the knife. Every other knife i have that uses this type of clip has regularly spaced mounting holes. The combination of things made it difficult to make work.
I will post pics as soon as possible, but I wish there had been a different method used for mounting. The knife is awesome, and the sheath is awesome ...
At this price, for a Taiwanese knife, The sheath should have been molded as one piece with some manner of belt attachment. Other such Tactical knives in this price range have done just that - IE the Timberline Zambezi, which also has a locking sheath, and uses integral molded webbing loops.