1 Riyal - Ahmad Gold, with incuse 4

Ahmad bin Yahya became Imam of Yemen following the assassination of his father Yahya in 1948 — a coup attempt that Ahmad suppressed with considerable violence before consolidating power in Sana'a. These gold riyals were struck in limited quantities for presentation and reserve purposes rather than general circulation, reflecting Yemen's near-total isolation from international monetary systems under Imamate rule. The "incuse 4" designation distinguishes a specific die state within Y#G17, where the numeral appears recessed rather than in relief — a detail that separates this variety from otherwise near-identical strikes of the same type.