Helmeted bust of Athena, (I could be wrong), butting bull on the reverse. Monogram above bull. AE20, 7.61g. The closest match is Trapezopolis, however all those are hemiassarions, around 14mm in diameter, whereas mine is 20mm. The other bulls found on coins are the Thourioi Greek coins, and some Macedonian coins from the 2nd century BC. but no match there either. Any ideas?
Macedon Pella is an option, however the bull is "feeding" and not "butting" on their coins. Mine also seems to have a small "hump". The monogram which is not clear on my photo seems to be a MP type.