Watch List notes:

CALABRIA. Tarentum. Circa 465-455 BC. Nomos or Didrachm (Silver, 18,5 mm, 8.17 g, 12 h). ΤΑΡΑΣ Phalanthos, nude and with his arms outstretched to left, riding a dolphin swimming to left; below, scallop shell. Rev. Hippocamp swimming to left; below, in front of hippocamp's tail, fish swimming to left (either worn or, possibly, incompletely erased from the die). Fischer-Bossert 107 (V55/R71). HN III 827. SNG ANS 840 (same reverse die). SNG ANS 841 (same obverse die). Vlasto 135-6 (same obverse die). Very rare, the second known example from this die pair - the other is in Leiden. Lightly toned and clear. With traces of overstriking on the reverse, otherwise, good very fine.
From the Aletheia Collection, Nomos 21, 21 November 2020, 22, ex Numismatica Ars Classica 59, 4 April 2011, 485, and from a British collection acquired well prior to 2010.