Shackles. Rare iron ball and chain for a slave

Shackles. Rare iron ball and chain for a slave, with an early 1860's tower leg iron attached at the end of chain. Tower takes a barrel bit key to unlock. The tower ball and chain has an approx. 5" ball with a 4" handle built into the ball when the ball was cast. It has a long chain.
-- Slave shackles. A friend purchased them from a reputable dealer of such items in Ethiopia.
-- Slave Shackles. Another friend purchased them from a reputable dealer in the Congo.
-- Slave shackles. We got them from a gentleman at the Slave Coast castle in Ghana. He wrote in the authentification letter relating the history of the shackles. He stated that his ancestors had used them in collecting slaves for the Europeans. An hard-to-find item with a verifiable provenance.