The atlas own weapon-class description of the takouba, sourced from the English Wikipedia Takouba article, covers only the blade physical form; that article gives no century, decade or empire for when the sword type first emerged, and no corroborating dated source was found in this pass.
What would resolve this A specialist source on Saharan and West African edged weapons, such as a museum arms catalog or an academic study of trans-Saharan military history, giving a specific date, century or empire for the earliest emergence of the takouba.
OpenHistory of African edged weapons and trans-Saharan tradeWikipedia: Takoba