One doesn't see this animal on a coin every day: Syracuse Sicily Bronze Tetras Octopus Head of Arethusa right with dolphins Octopus Struck: BC 425-420 Syracuse mint Size: 15.4mm Weight: 3.84gm Catalog: SNG Cop 653 A tetras was 1/4 of an obol, an obol was 1/6 of a silver drachm.
I like those. Got one myself : Uncia ? c. 420 BC Head of Arethusa right, SYPA in right field Octopus, globe above 2.55 gr, 14 mm Ref : Sear #1184, SNG ANS 376 ff Both have known better days though Q
They come in silver also. Mine is a litra which you may choose to call an obol if you wish. They come much nicer than this but really nice si;ver ones can get expensive.