The closest similar coin is the Sicily-Kamarina Tetras... but this is not that... the owl is clearly different then any other, the mint mark is different (unknown to me what this one is), and the head is facing the opposite direction. So.. what is this!??
Looks like your post got bumper by an over zealous noob before you could get an answer from anyone, so I'm giving it a little bump. At first I thought yours might be a fake dude to the weird style of the owl, but now an thinking it's just over cleaned. The owl is different than mine as well but I'd like to read what others think of yours. Attica. Athens. Circa 224/3-198 BC. Av.: Helmeted head of Athena right Rv.: Owl standing right with open wings. Ref.: Kroll 69. Fine, brown patina Weight: 8.15 g