Roman republic. Aes Grave Sextans, Anonymous. Circa 240-225 BC. 39.85 g. 

Head of Mercury left, in petasos; oo at lower right.
Prow of galley right; oo below. 

Crawford 35/5; Sydenham Aes Grave 6; Vecchi 55

With permission of Numismatica Ars Classica, May 2007.