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; RRSC B81.     4.7 g.   20 mm.        Extraordinary heavy and choice example. Pleasant tone. Hairline flancrack.    EF.