VF+ Ancient Greek bronze coin of Philip III Arrhidaios son of King Philip II of Macedon 323-317 BCKings of Macedon. Philip III Arrhidaios AE Bronze 323 317 BC Size: 14. 8mm Weight: 3. 1 grams Obverse: Macedonian shield; on boss, head of Herakles facing slightly right. Rev: B A, Macedonian helmet Philip III Arrhidaeus was king of the ancient Greek kingdom of Macedonia from 323 until his execution in 317 BC. He was a son of King Philip II of Macedon by Philinna of Larissa, and thus an elder half brother of Alexander the Great. Named Arrhidaeus at