Watch List notes:

KINGS of MACEDON. Antigonos II Gonatas. 277/6-239 BC. AR Tetradrachm (27mm, 17.01 g, 12h). In the name and types of Alexander III. Amphipolis mint. Struck circa 275-272/1 BC. Head of Herakles right, wearing lion skin / Zeus Aëtophoros seated left; Macedonian helmet in left field, monogram below throne. Price 621; Mathisen, Administrative, VI.6; HGC 3.1, 1040. Good VF.

From the B. H. Webb Collection. Ex Classical Numismatic Group Electronic Auction 119 (27 July 2005), lot 21.