The scabbard has a Hausa tribe look to it and the dagger seems to be an older 19th century Tebu style example. I like it
. I took the liberty of brightening up your photo. The other dagger is a 20th century Tebu dagger. I have also attached a photo of a 19th century Beja warrior from the Sudan noticed his arm dagger seems to be right on the spot when compared to yours.
Lew