Watch List notes:

MACEDON, Chalkidian League. Circa 432-348 BC. Tetradrachm (Silver, 22 mm, 14.43 g, 1 h), Olynthos, c. 420-417. Laureate head of Apollo to left. Rev. Χ-Α-Λ /ΚΙΔ /ΕΩΝ Kithara with seven strings. Robinson & Clement Group A, but these dies unknown. See MCD 4, 15 November 2018, 22 (same dies but in inferior condition). Extremely rare, the second, and best, example known. With a splendid head of Apollo, struck in high relief. Die break in Apollo's hair, otherwise, good extremely fine.
Ex H. J. Berk B or BS 178, 15 March 2012, 51.