1/4 Riyal - Yahya 'Sana' below date, 4 stars in border

Imam Yahya's North Yemen operated in near-total monetary isolation during this period, with the San'a mint producing coins under deliberately archaic methods to assert independence from Ottoman monetary infrastructure that had dominated the region for centuries. The "Sana" mint mark below the date distinguishes this variety from contemporaneous Hodeidah strikes — a distinction that matters, as output figures between the two facilities varied considerably and are still not precisely documented.