I have absolutely no idea what type mine is.... But I like the coin Attica, Athens Coin: EF AR Tetradrachm None - Athena Helmeted Right AΦΕ - Owl standing right, head facing, crescent & olive-sprig behind within incuse square Mint: Athens (415 BCish) Wt./Size/Axis: 17.13g / 26mm / -
"(415 BCish)" I'd call that a reasonable guess. It is Classical. It is also a nice coin that you should like.