Watch List notes:

CALABRIA. Tarentum. 500-480 BC. Hemilitron (Silver, 7 mm, 0.34 g). Cockle shell; below, to left and right, pellet; border of dots. Rev. Dolphin swimming to right; above and below, pellet, circular border. HN III -. Vlasto -. Extremely rare. Well-struck and sharp. Some encrustations, otherwise, nearly extremely fine.
From the "Collection sans Pareille" of Ancient Greek Fractions, and that of Leo Mildenberg, cited on the ticket as being ex MM FPL 300, but this is mistaken.