Marcus Agrippa, Issue by Caligula, 37 - 41 AD
AE As, Rome Mint, 29mm, 11.84 grams
Obverse: M AGRIPPA L F COS III, Head of Marcus left wearing rostral crown.
Reverse: S C, Neptune standing left holding dolphin and trident.
RIC58 // Sear1812
Smoothed area on reverse.