Herakles - CRANNON. $18.62 Aug-07-01 Seller herakles_inc Thessaly - Crannon 400-344 B.C. AE 15 mm. 3.929 grams. Obverse: Head of Zeus, laureate, r. Reverse: Hydria mounted on wheels on each stands a raven. Rogers 203. It was customary in times of drought to take a sacred chariot with hydria in a procession through the city to supplicate Apollo for rain, and if two crows (ravens) settled on the wheels, that was a sign that Apollo would grant the prayers of the faithful. Two ravens are depicted on this coin, which is very rare! Herakles Numismatics, Inc.