Rare dated Roman Egypt Alexandria Empress Tranquillina (wife of Emperor Gordian III) billon silver tetradrachm coin, 12.21g.
NGC Certified authentic to Ch VF.
Issued in Gordian III's 7th regnal year denoted by Greek letter Z = 243/4 CE.
Emmett 3464/7, rated as R3 (very rare).
Obverse: Draped bust of empress facing right.
Reverse: Laureate bust of Zeus facing right, date letters L Z.