Philip I Philadelphus King of the Seleucid Empire from 95 BC to 84/83 BC.
Philip I Philadelphus was the fourth son of Antiochus VIII Grypus and his wife Tryphaena.

Philip I took the diadem in 95 BC together with his brother (probably twin) Antiochus XI Epiphanes, after the eldest son Seleucus VI Epiphanes was killed by their cousin Antiochus X Eusebes. He established himself in Antiochia after 92 BC and survived attacks from younger brother Demetrius III Eucaerus.

His rule was ended in 83 BC when Tigranes of Armenia conquered Syria, or earlier. He disappears from history at that point, but coins bearing his portrait were issued by later Roman authorities.
Philip I Philadelphus
An AR Tetradrachm struck 88-75 BC in Antioch
Obverse: Diademed head right

Reverse: Zeus seated left, holding Nike in right crowning him with wreath, long scepter vertical in left BAΣIΛEΩΣ / ΦIΛIΠΠOY // EΠIΦANOYΣ / ΦIΛAΔEΛΦOY; N

Diameter: 26 mm
Die Orientation: -
Weight: 16 g
SC II 2463, Newell SMA 441, SNG Spaer 2803; HGC 9, 1319
An AR Tetradrachm struck 93 - 83 BC in Antioch
Obverse: Diademed head right

Reverse: BAΣIΛEΩΣ ΦIΛIΠΠOY EΠIΦANOYΣ ΦIΛAΔEΛΦOY to right and left of Zeus seated left, holding Nike and sceptre

Diameter: -
Die Orientation: -
Weight: 15.46 g
No notes for this coin
No references provided for this coin
An AR Tetradrachm struck 88-87 B.C. in Antioch ad Orontem
Obverse: Diademed head right.

Reverse: BΑΣΙΛΕΩΣ ΦIΛIΠΠΟΥ ΕΠΙΦANOYΣ ΦΙΛΑΔΕΛΦΟΥ - Zeus Nikephoros seated left on throne, holding Nike and lotus-tipped sceptre.

Diameter: 27.3 mm
Die Orientation: 12 H
Weight: 15.98 g
No notes for this coin
SC 2463.