Watch List notes:

CELTIC, Eastern Celts. Circa 2nd century BC. Tetradrachm (Silver, 24 mm, 12.59 g, 11 h), imitating Philip II of Macedon. Celticized head of Zeus to right. Rev. Celticized horse to left, rider holding branch in his left hand. CCCBM I 28. DT 9870. Toned and attractive. Some flatness, otherwise, extremely fine.
From a Swiss collection, ex SKA Monetarium FPL 59 Spring 1993, 4.