Ancient Greek(?) Coin, Or More Likely, A Fake?

It's a Ptolemaic tetradrachm, I just can't decide from the pictures if is is a tourist copy or not.

When assessing it for style, it appears to me to be at the the limit of what I consider to be acceptable for style. It is the obverse that I am having most problems with.

What do the edges look like?

If it is a copy, it is the rough surfaces that suggest that it has been cast. Look for some evidence for a casting inlet somewhere around the edge.

Also, look to see if there is a tiny piece of plating missing anywhere on the surfaces or edge, to reveal poorer metal underneath. You may need strong magnification to do this.

It LOOKS to be of good silver, but it needs to be weighed accurately to 1/10 of a gramme.

to the community.

The style looks right, but the porous surface concerns me a bit and could mean a cast copy. If you can take another closer picture without the quarter and include one of the edge we might be able to tell better.

Cast copies of coins often have a greasy feel about them. Worth checking for this.