Earliest report on the use of Manillas in Africa points to its origin in Calabar the capital city of the Cross River State of coastal Southeastern Nigeria. It has been documented that in 1505 at Calabar, (Nigeria) Manillas were being used as a medium of exchange, one "manilla" being worth a big elephant tooth, and a slave cost between eight and ten manillas. They were also in use on the Benin river in 1589 and again in Calabar in 1688, where Dutch traders bought slaves against payment in rough grey copper armlets which had to be very well made or they would be quickly rejected.