Hello Detlef, I'm not quite sure if the hilt is made from horn, black palm or possibly ironwood. I know that the blade not having a chisel ground blade is not completely unheard of as I have a Plamingko that does not have a chisel ground blade, it just seems unusual for one with this blade shape.
Here are the best photos that I can get from the original one for a close-up of the hilt as well as one of the Plamingko.
Best,
Robert