This is a 19th/20th Century Sundanse African Dagger with a leather sheath and handle. The flat blade is engraved with a geometric shape on both front and back. The sheath has a slight lip and also displays a geometric pattern on the front. 
 
The blade has some oxidation on the surface. The dagger shows signs of wear and age. 
 
Dimensions: 12 3/4" L X 2 1/4" W