Watch List notes:

KINGS of MACEDON. temp. Alexander III – Seleukos I. Circa 324/3-300 BC. AR Tetradrachm (25mm, 17.08 g, 2h). In the name and types of Alexander III. Uncertain mint in the east. Head of Herakles right, wearing lion skin / Zeus Aëtophoros seated left; monograms in left field and below throne. Unpublished. Minor porosity. Good VF. Extremely rare.

The left field monogram is a retrograde form of that found under the throne on Price 817, but the style of the obverse here suggests an eastern mint, as do the characteristics of the flan, which is rather thick and flat-edged.