Watch List notes:

Gaius (Caligula). AD 37-41. Æ Sestertius (35mm, 30.48 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. VF, dark green to black patina, light smoothing, pitting and corrosion.