African Three-Dagger sets

[Iliad]

Hi all,
Here are two more of the 15 items I bought 2 days ago. The seller's father, now deceased, visited northern Africa in 1920 and obtained this and other edged weapons. They have remained in the family for 92 years.
The seller thought, but was not sure, that these dagger sets were part of a chief's regalia and were worn on the chest. Can anyone provide more information about them?
Best,
Brian