Zanzibar, ancestor of 421

A game of chance, "Zanzi" (or Zanzibar game) consists of rolling 3 dice of the same value (three of a kind). With a population of over 700,000, Zanzibar City is part of the Zanzibar Archipelago in Tanzania. Although the exact date of the dice's appearance is uncertain, cubic specimens have been found in tombs dating back to the 5th millennium BC in the Indus Valley.