(KNM-ER 3733) Natural size, in SOMSO-PLAST®. Expert guidance for the reconstruction provided by the Department for Prehistoric Anthropology and Human Ecology of the University of Göttingen. Site and date of find: Koobi Fora, East Turkana Region, Kenya, East Africa, 1975. Age: approximately 1.7 million years, upper Pliocene. Separates into 2 parts.