South Arabia. Sabean kingdom. Late 4th-mid 2nd centuries BC. AR eighth unit (8mm, 0.61g). Imitating Athens. Helmeted head of Athena r. Σ (mark of value) on cheek / Owl standing r., head facing; crescent to l.; 'staff and D' symbols below; AQE to r. Munro-Hay 1.3.iv.