Dinar - Jayyash ibn al-Mu'ayyad

The Najahids were an Abyssinian slave-dynasty who carved out autonomous control over Yemen in the eleventh century, nominally subordinate to the Fatimid caliphate in Cairo. Jayyash ibn al-Mu'ayyad ruled during a period of persistent factional pressure from rival Yemeni powers, and coinage in his name is genuinely scarce — the dynasty's output was never prolific, and gold issues attributable to specific rulers within it surface rarely in the trade.

The Fatimid weight standard underpins this piece, consistent with Najahid practice of aligning their gold to Cairo's monetary conventions despite operating well outside direct Fatimid administrative control.