got an anwswer from a friend about it, cartridge collector, he have only one pic of the 10,75x61 Haenel in the original DWM cartridge case book.

and I mean the original book

will ask him for a pic of this very rare thing

he have a cartridge but can't give me a price because for many years there was no cartridge on the market for sale.
its one of the rarest cartridges DWM was making.