This denarius was minted in Rome by Lucius Cornelius Scipio Asiaticus in 106 BC. It is a type of coin known as a denarius serratus due to its serrated edge. The obverse depicts a bust of Jupiter wearing a laurel wreath; in front of him is the mint control mark E.
From about 150 BC through to the mid 60's BC, certain issues of denarii were made with serrated edges. The coin blanks were cut before minting. The reasons for this practice are unknown – perhaps it was just a fashion.
The reverse depicts Jupiter again. The father of the gods holds a scepter and hurls a thunderbolt while driving a quadriga, a four-horse chariot. Below the hooves of the horses is the inscription L. SCIP. ASIAG, the abbreviated name of the moneyer Cornelius Scipio.