Watch List notes:

Celtic World. Celtic, Eastern Europe. Debased AR Tetradrachm, c. 2nd century BC. Celticized laureate and bearded head of Zeus right. / Stylized rider on horseback left; crescent behind. Cf. Göbl, OTA pl. 36, 442/2; cf. Castelin 1339. AR/BI. 7.60 g. 24.00 mm. RR. Very rare. Blackish patina, turquoise spots on obverse. VF.