CALIGULA, A.D. 37-41. AE Sestertius (25.44 gms), Rome Mint, ca. A.D. 37-38. GOOD VERY FINE. RIC-37. Obverse: laureate head of Caligula left; Reverse: S P Q R / P P / OB CIVES / SERVATOS in four lines within oak wreath. NGC has determined that this coin has been tooled, and thus is not appropriate for certification.