Ivorian Mandinka Chordophone (Harp): "Bolon"

This Ivorian string instrument is similar to a "kora" or a "bolon," bridge harps that are played by the Mandinka people of West Africa.

It is made from a gourd as a resonator covered with antelope skin or goat. The handle is made of wood. This particular instrument has six strings, a number that does not match either the kora, traditionally strung with 21 strings, or the bolon, traditionally strung with four. 

A sheet metal rattle is attached to the top of this instrument's neck. The "kono-nyan-ya" are the jingles found on a kora or bolon. They are attached to the head of the instrument’s neck and consist of one broad, curved metal sheet with many small metal rings attached around its edges. The kono-nyan-ya vibrate as the strings of the instrument are played, adding a layer of metallic sound to the music. While the strings are usually attached to the rattle in a bolon, in this instrument the strings are attached to the neck itself.
Source:
http://www.theafricanguild.com/mandingmusic/instruments.html#konting
http://www.spurlock.illinois.edu/explorations/online/senufomusic/instruments/kono-nyan-ya1.html