Coin Identfy Greek ?

I think this might be a cast replica of an ancient coin, painted gold. Could you take a photo of the rim, it looks like it came out of a mold.

A cast copy is a replica mostly made to be sold resembling real versions of the coin. They are usually quite in resemblance with the original but there are also many defaults. As in this one, it seems to have either been gold painted/plated which is now getting off and also the rim which seems to have been from a cast probably. Also, the is no writing on it. The heavy set features on it also make it very likely to be one.

Though I am not 100% sure it's fake, this coin strikes me as odd. I am not an expert in this. Sorry...

I'm not a collector of Ancient Greek coins, but I have seen my share of genuine and fakes coins. If I had this coin in hand my first impression would be that it's a tourist copy. In don't know where you are in the UK, but in London there are coin dealers that would be able to tell you if it's real or not. I would recommend that you contacting one of them.

No, ancient coins of this time period were struck, not cast. The square pattern on the reverse is very distinctive of older (or "archaic") coins, roughly 600-350 BC. The pattern comes from the nail-like punch used to smash the main design of the primary die into the coin. As time went on, they gradually evolved the idea of putting a design on the punch as well, creating coins with a design on two sides rather than just one.

So if your coin has an obvious casting seam, or looks like two half-coins stuck together, then yes, sorry, it's a fake.

There isn't enough detail left on the portrait to be certain of who it's supposed to be. He/she seems to be wearing a wreath or crown of some kind.