Watch List notes:

BITHYNIA, Kalchedon. Circa 260-230s BC. AR Tetradrachm (30.5mm, 16.18 g, 12h). In the name and types of Lysimachos of Thrace. Diademed head of the deified Alexander right, with horn of Ammon / Athena Nikephoros seated left, left arm resting on shield, spear behind; AΓ monogram to inner left, ornament on throne, grain ear in exergue. Marinescu Issue 30 var. (O28/R63 [unlisted die combination]); Müller –. VF, toned, rough surfaces. Very rare.