Wikipedia
Ramkie
The Ramkie (also called an Afri-can) is a type of guitar usually made in South Africa, Botswana, Zambia, Namibia and Malawi. It is made using a discarded oil can (or similar) for the soundbox. It has three or four strings (rarely six like a guitar), made of fishing wire or bicycle brake wire, and may be fretted or fretless. The instrument has apparently always been used for repetitive chord-playing, not melodic patterns.