Augustus (27 BC - 14 AD).     AR Denarius, Lugdunum mint, 15 BC.   Obv.    AVGVSTVS DIVI F. Bare head right.        Rev.   Bull butting right; in exergue, IMP•X.     RIC I (2nd ed.) 167a.     3.79 g.   20 mm.        Delicate patina with a hint of iridescence. Area of weak strike on obverse. Irregular flan otherwise.    good EF.