Musical Instruments of Central and West Africa -Stamps of Rwanda 1973
Rwanda issued stamps on Musical Instruments of Central and West Africa on 09 Apr 1973.

20c – Longombe – Box shaped soundbox that has arches with strings.
30c – Horn
50c- Gyil – Also known as Belafon and is a kind of Xylophone or percussion idiophone which plays melodic tunes. It has 16 to 27 Keys.
1F – Harp