Huge Beja Dagger with Silver Filigree

[Battara]

I recently got this Beja dagger. It is huge (12.75 inches long). The silver filigree caught my eye and the blade is hand forged and blued/blackened.

I know that these were used in Ethiopia and what is now Eretrea.

What I don't know is if this belonged to royalty. Never seen this before, but this is also out of my usual field.

BTW - I did clean the silver since it was completely black when it arrived.

Any help and comments would be appreciated.