Eastern Celts AR Tetradrachm, B-Reiter type

Eastern Celts. Carpathian region . Uncertain tribe. Early 1st century BC. AR Tetradrachm (23-24 mm, 11.57 g). B-Reiter type.
Obv. Celticized head of Zeus right, S-like ornament in hair.
Rev. Horseman riding left, B at end of hair/plume.
Lanz 656; OTA 308.

Nicely toned and very fine.