Notice in the picture above the D'k Tahg's are different. The top one has the fixed blades and can be seen through TNG, DS9, and VOY. The knife under it is the ST3 style that had working blades (this prop might not, can't tell from the pic as I don't see a button). Also, if you notice, the photos that the Images that NickDaring posted way above with the first set of screen caps, you can see there is writing on one side of the handle from blade to butt. I'm sure most of it is probably gibberish, but it would be a great prop to replicate. As far as I know, it's the only Klingon knife that has so much text on it.
Here's a close up of the biggest part of the text area: