Watch List notes:

Gaius Caligula. A.D. 37-41. Æ sestertius (35 mm, 5.82 g, 6 h). Rome mint, Struck A.D. 39/40. [C CAESAR DI]VI AVG PRON AVG P M TR P III P P, laureate head left / S P Q R/ P P/ OB CIVES/ SERVATOS, in four lines within oak-wreath. RIC 46; BMC 58. VF, slightly mottled green and brown patina.