Heracleia-Pontica, Bithynia. AE36, semi-provincial issue. AD 238-244.

TON KTICTAN, diademed head of Herakles left, holding club over right shoulder.
HRAKLHAC A MATROC APOIKWN POLIWN, Zeus, wielding thunderbolt, driving quadriga of galloping horses right, two serpent-legged  giants before the horses.

Prowe (1913) 16 (this coin).

Image copied from Prowe's article in Numizmaticeskij Sbornik 3 (1913).