Watch List notes:

Seleucis and Pieria. Antioch circa 29-28 BC. In the name and types of the Seleucid king Philip I Philadelphos; Dated year 21 of the Caesarean Era (29/8 BC)
Tetradrachm AR

27 mm, 15,05 g

Diademed head right / [ΒΑΣ]ΙΛ[ΕΩΣ] [Φ]ΙΛΙΠΠΟ[Υ] [ΕΠ]ΙΦΑΝ[ΟΥΣ] [ΦΙΛΑΔΕΛΦΟΥ], Zeus Nikephoros seated left, AT monogram to inner left; KA in exergue.

very fine

Prieur 15 var. (AK for date); RPC I 4138 (AK for date); SC 2491.11 var. (AK for date); HGC 9, 1360k (AK for date).