Caligula, AE Quadrans
Mint of Rome, 40 A.D.
17.5mm, 2.37 gm, die axis: 6:00
Obv: C CAESAR DIVI AVG PRON AVG S - C. Pileus or "Liberty Cap"
Rx: PON M TR P IIII P P COS TERT around RCC.
RIC I, 52, SR 1804, VM 10 b.