Pertinax AE23 of Prusas ad Olympum, Bithynia. 5.21 g.

AYT K P ELBIOC PERTINAX CEB, laureate head right.
PR-OY-CAEWN, hexastyle temple. 

RecGen 65.

With permission of Numismatik Naumann auction 65, Lot 317, May 2018.