Watch List notes:

Gaius (Caligula). AD 37-41. Æ Sestertius (34mm, 26.56 g, 6h). Rome mint. Struck AD 37-38. Laureate head left / S•P•Q•R/ P • P/ OB CIVES/ SERVATOS in four lines within oak wreath. RIC I 37. Rough brown surfaces, areas of hard green. Fine.