Watch List notes:

Gaius, called Caligula (37-41), Quadrans, Rome, AD 40-41; AE (g 2,86; mm 17; h 6); C CAESAR DIVI AVG PRON AVG, round pileus between S - C, Rv. PON M TR P IIII P P COS TERT, round R C C. RIC 52; BMCRE 64.
About extremely fine.