Neat indeed! My guess is that this is a one-of-a-kind item made by a 19thC artisan. Since a translation will go a long way in helping to solve the mysteries of this blade i would highly recommend that you contact the owner and get the inscription to pass along to the forum. Compared to some languages we get on blades German should not be all that hard to get translated. And if your friend ever has any interest in getting rid of this blade please let me know. It's right up my macabre alley