Watch List notes:

Anonymous. AE Half Unit, Neapolis mint, after 276 BC. D/ Helmeted head of Minerva left. R/ Horse's head right; in left field, ROMΛΛC (upwards). Cr. 17/1a var. (legend variety not listed for 17/1a, but for 17/1d). Balbi de Caro, RIN 1988, p. III, 1915. AE. g. 3.44 mm. 17.50 Extremely rare variety. Deep olive green patina. VF.

The second example known (see RBW 69).