Bithynia, Kalchedon Æ 21mm. Circa 240-230 BC. Laureate head of Apollo to left; c/ms: grain ear within circular incuse, amphora(?) within circular incuse / Tripod; ΚΑΛΧΑ to left, ΔΟΝΙΩΝ to right. SNG BM Black Sea 143-5; HGC 7, 539. 5.35g, 21mm, 12h.
Very Fine; overstruck.
From the inventory of a UK dealer.