Watch List notes:

CELTIC, Carpathian region. Uncertain tribe. 2nd-1st centuries BC. Tetradrachm (Silver, 18 mm, 8.74 g, 9 h), type 'Sattelkopfpferd'. Celticized head of Zeus to right. Rev. Horse standing left; the horseman devolved into two pellets. Dembski 1224. Kostial 627. OTA 300/5. Boldly struck and of exceptionally good metal for issue. Very fine.
From a French collection, acquired from Felzmann.

Coins of this type are sometimes addressed as Didrachms instead of Tetradrachms (e.g. B. Ziegaus, Kelten Geld - Sammlung Christian Flesche (2010), p. 268, 723-725).