MESOPOTAMIA. Carrhae. Diadumenian, as Caesar, 217-218. Tetradrachm (Billon, 25 mm, 13.75 g, 6 h). ΚΑΙC•Μ ΟΠЄΛ ΑΝΤⲰΝΙΝΟC Laureate, draped and cuirassed bust of Diadumenian to right, seen from behind; behind bust, •. Rev. ΔΗΜΑΡΧ ЄΞ ΥΠΑΤΟC• Eagle with spread wings standing facing on facing head of a bull, head to right and holding wreath in beak. Prieur 829. Rare. Very fine.