This a decorated, disc-shaped Phoenician weight (3.8 grams, 14mm; a 1/4 sheqel or 1/20,000 of a Talent), not a coin exactly, but more of a "numismatic object" or a form of "exonumia." '
I'm not sure where you draw the line "coin" vs. "not coin." After all, the early electrum (EL) coinage of Greece (e.g. Lydia; Miletos; see the post(s) below also), were simply bean shaped blobs of metal, less "coin-like" than this object. We got it for, I think $0.38 in 3-kilo box of ancient coin a couple years ago (best purchase ever! almost every coin sold for several dollars, and there were about 1,000). I suppose it's worth somewhere between $38 and $3,800. I'm not an expert in this rare so I can't say for sure.
I'll certainly welcome comments and suggestions!