Diadumenian. AE18 of Caesarea Germanica, Bithynia. AD 217-218. 2.52 g.

M O ANT DIADOYMENIANOC K, bare-headed, draped bust right.
KAICAPEIAC GERMANIKHC, coiled serpent on altar, head right.

Mionnet Supp. VIII 18; RecGen 25; Paris 316.

Courtesy of the Bibliotheque Nationale, Paris, gallica.bnf.fr.