Arabia Felix. Saba’. Mid-fourth-second century BC. AR quarter unit (10mm, 1.25g). Head of Athena r., wearing Attic helmet; on cheek, Sabaean letter X / Owl standing r., head facing; to l., olive spray and crescent; Cursive legend above; South Arabian YNF monogram to l. and Mukarrib monogram to r. Munro-Hay 1.7iii; Huth 248. Extremely rare.