Watch List notes:

KINGS of MACEDON. Antigonos I Monophthalmos. As Strategos of Asia, 320-306/5 BC. AR Tetradrachm (25.5mm, 17.06 g, 6h). In the name and types of Alexander III. Susa mint. Struck under Aspeisas, circa 316-311 BC. Head of Herakles right, wearing lion skin / Zeus Aëtophoros seated left; wreath in left field; below throne, retrograde K above strut, monogram below. Price 3859 var. (K not retrograde); ANS 1947.98.312 var. (same; same obv. die). VF, toned. Unique variety of an extremely rare issue, only one example in Pella, none in CoinArchives, none in ANS Photofile.

From the Colin E. Pitchfork Collection, purchased from Spink, February 1994.