Watch List notes:

ASIA MINOR. Uncertain mint. 5th-4th centuries BC. Tetartemorion (Silver, 5.5 mm, 0.17 g, 6 h). Head of Apollo(?) left, wearing tainia. Rev. Owl standing left, head facing; to right, retrograde Σ; all within incuse square. Klein -. Rosen -. SNG Kayhan -. Cf. CNG 94, 2013, 700 (without retrograde Σ). Unpublished in the standard references. Very fine.
From the collection of a scholar.