My dad emailed me these pics of the tanto he had made for me back in the late 80s by a South African bladesmith called Peter Bauchop (since deceased).
This was the knife I used to defend myself in a 3-way mugging on a 3rd class train-coach in Cape Town a few years after he gave it to me, so it has some sentimental value:
Can't tell you much about how well it penetrates, but I do know it'll slash a bicep in half.
Good-looking blade!