CALIGULA, A.D. 37-41. Fourree Denarius (2.67 gms), Imitating Rome Mint, ca. A.D. 40. PCGS FINE, Strike: 5/5 Surface: 1/5. Core Visible. cf. RIC-28 (for prototype); cf. RSC-21 (same). Obverse: Laureate head of Caligula right; Reverse: SPQR/ P P/ OB C S in three lines; all within oak wreath. An ancient plated forgery. Exposed base metal core in several areas, particularly the reverse center.