Alexander the Great, possible lifetime issue tetradrachm, Byblos mint c. 330 - 320 BC:
Obverse: Head of young Herakles wearing lionskin.
Reverse: ΑΛΕΞΑΝΔΡΟΥ ; Zeus enthroned left with eagle, monogram to left.
Weight: 16.12 grams. Average diameter: 28 mm.

Possibley a lifetime issue, though on this one, Zeus' legs are crossed and there's no royal title. The monogram in the reverse left field is thought to stand for King Adramelek, a Phoenician ruler at the time.

This coin was minted at some point after the Siege of Tyre c. 332 BC as Alexander marched through Phoenicia. That siege took six months and required Alexander to build a causeway a half mile long out into the Mediterranean Sea to reach the island city of Tyre, a technological feat that had never been accomplished before. This was a key event in establishing the legend of Alexander's invincibility. Byblos, a Phoenician city where this coin was minted just north of Tyre, supported Alexander in this fight.