Watch List notes:

Gaius (Caligula). AD 37-41. Æ Sestertius (36mm, 27.89 g, 6h). Rome mint. Struck AD 40-41. Laureate head left / S P Q R/P P/OB CIVES/SERVATOS in four lines within oak wreath. RIC I 53. VF, brown patina, holed, edge scrape.