Watch List notes:

Mysia, Atarnios. Ca. 400 B.C. Æ 15 (15.1 mm, 3.88 g, 11 h). Rare. Laureate head of Apollo right / ATAP or similar, Forepart of horse right, coiled serpent behind. SNG BN -; BMC -; SNG vA -. Fine. 

This coin has a much longer, yet indecipherable legend, behind the horse. No long legends are recorded for this city and type.