Severus Alexander AE25 of Prusa ad Olympum, Bithynia. AD 222-235.  9.1 g. 

M AYR CEYH ALEXANDROC, laureate head right.
PROYCAEWN, Poseidon standing right, left foot on rock, holding trident and dolphin.

RecGen 136; Mionnet Supp. V, 1363.

With permission of Numismatik Naumann auction 65, Lot 319, May 2018