Wheel series.     AR Denarius serratus, uncertain Apulian mint (Tarentum?), 208 BC.   Obv.    Helmeted head of Roma right; behind, X.        Rev.   The Dioscuri galloping right; below, wheel; in exergue, ROMA.     Cr. 79/1.     4.44 g.   19.50 mm.        Sound metal and full weight. A superb and brilliant example, with lovely iridescent highlights.    EF.