If you are iterested in Ethiopian coins, perhaps you would also be interested in the book
Ethiopia: Travels of a Youth available here. It includes many topics on Ethiopia and Eritrea.
The following summarizes the talk given by Mike Metras January 5 on
the coins of Ethiopia.
Early Coinage
Ethiopia is an very old country in Northern Africa. In ancient times a kingdom centered around the modern northern city of Axum
ruled all the southern Red Sea and issued many coins. You saw those
coins [its early coins] a year ago with my video, Axum, Coins and Places.
Throughout
its long history Ethiopia used many forms of primitive monies that
included salt bars and cowrie shells....