RIC 1 52- Rome mint- Caligula quadrans with SC and legend around is : C CAESAR DIVI AVG PRON AVG = Gaius Caesar, great grandson of the divine Augustus, princeps (Augustus). Reverse shows
RCC with legend around: PON M TR P IIII PP COS TERT = high priest, holder of tribunican power for the fourth time, father of the nation, consul for third time. RCC is remissa ducentessima. Joe Geranio- Julio Claudian Iconographic Association.