Watch List notes:

THRACE, Byzantion. Alliance coinage with Kalchedon. Late 3rd-2nd centuries BC. Æ (23.5mm, 5.02 g, 12h). Laureate head of Apollo right; c/m: monogram within incuse square / Tripod. Schönert-Geiss, Byzantion 1283–9; Türkoğlu A3a; HGC 3, 1427. Dark brown patina. Host coin VF, countermark Good VF.