Watch List notes:

Thrace, Mesembria AR Tetradrachm. In the name and types of Alexander III of Macedon. Circa 275-225 BC. Head of Herakles to right, wearing lion's skin headdress; monogram behind ear / Zeus Aëtophoros seated to left, holding sceptre; ΒΑΣΙΛΕΩΣ to right, ΑΛΕΞΑΝΔΡΟΥ to left, Corinthian helmet in left field, monogram under throne. Price -; CN Online 6805 corr. (listed as Price 991); SNG Stancomb -; Karayotov I, 31. 16.59g, 32mm, 12h.

Near Extremely Fine; attractively toned with hints of iridescence. Extremely Rare; only one example known to Karayotov, and no other examples on CoinArchives.

Ex Solidus Numismatik, Auction 49, 17 November 2019, lot 9.

The possibly unique appearance of the monogram on the obverse could be a die engraver's signature.