Copper Alloy. Cm. 21,5 width x 17,5 high (8.46″ x 6.89″); grams 1.088,8 (38.41 oz.).
A Katanga cross is a cast copper cross which was once used as a form of currency in parts of what is now the Democratic Republic of the Congo in the 19th and early 20th centuries.
The name derives from Katanga, a rich copper mining region in the south-eastern portion of the DR Congo. These X-shaped ingotswere cast by local coppersmiths by pouring molten copper into sand molds.
For similar examples and more informations see:
“The Perfect Form”, by Roberto Ballarini, page 319;
“African Currency”, by Adolfo Bartolomucci, page 109