Lucius Calpurnius Piso Frugi, one of the Roman moneyers pf the year 90 BC, issued the highest number of coins of the entire Roman Republic. The reason supposedly was the war between Rome and its former allies that was fought during that time (91-88 BC), which led to an increased need of cash.
Frugi's silver coins always bore a somewhat archaic head of Apollo with a laurel wreath and long, stiff curls on the obverse. On this coin is a trophy for a mint control mark below Apollo's chin.
The reverses depicted a naked horseman in full gallop. On this coin he carries a palm – on other coins it is a whip or a torch. Below is the moneyer's name, L. PISO FRVGI, and the Roman number XCVIII, probably a serial number.