Celtic silver coin, most likely a Gaulish imitation of a Macedonian tetradrahm, dating roughly from the 2nd–1st century BCE. One side shows a stylized horse, a very common motif on Celtic tribal coinage derived from Greek originals. The other side appears to show a highly abstracted head with flowing hair/wreath, another hallmark of Celtic adaptations of coins of Philip II of Macedon. Legally bought from european auction house in 2020