Watch List notes:

Agrippa, As struck under Caligula, Rome, AD 37-41; AE (g 13,28; mm 29; h 6); M AGRIPPA L - F - COS III, head l., wearing rostral crown, Rv. Neptune cloaked standing l., holding small dolphin and trident; in field, S - C. RIC 58; C 3.
Strong portrait, amazing riverine patina, good extremely fine.