Watch List notes:

Sicily, Katane, Tetras, c. 405-405 BC; AE (g 1,81; mm 12; h 8); Head of river-god l. with horns and floating hair; at l. AMENANOΣ, dotted border, Rv. K-A, winged thunderbolt; around three pellets. CNS III, n. 1; SNG Copenhagen -; SNG ANS 1272.
Dark green patina. About extremely fine