Lot of two Sudanese knives

datable to the late 19th century: classic arm knife with sturdy two-edged blade well worked by beating, wooden handle with button made from an ancient Ottoman silver coin, brown leather sheath decorated with geometric impressions, complete with bracelet; in good condition with nice period patina. Together, another Sudanese knife, without sheath, with two-edged blade and tip and handle of ebonized wood L 22 and 32 cm