On the Bronze coins of Amisos from the time of Mithridates, I think it likely that the winged bust of a youth is Hermes (Mercury). On the coins of Amisos of this period the obverse and reverse are closely thematically tied one to another (Eros/Quiver, Perseus/harpa or pegasus, Dionysus/Cista Mystica, Athena/Perseus slaying Medusa, Herakles club and quiver, Amazon (?) in a leather persian cap/quiver and un strung bow, Artemis/tripod, etc…).
Hermes gave the Dioscuri their horses and is the bringer of good fortune (i.e. horn of plenty) the literary testimony is slim but solid. Which in turn made me thing about RRC 14/1 and RRC 25/4 in the aes grave series!