Philip II Macedonia - Cast Fake? Similar "Cast" Coin For Sale From Ebay

I'm not sure that I have ever seen coins this porous. Thry sure look like casting bubbles to me, but I'm interested to read what our Greek coin experts think.

Surface roughness on the first coin makes it difficult to determine if ?corrosion-ground burial? or ?casting?. If casting, then the remains of a sprue is sometinmes evident.
If cast, then quite often, the remains of a casting sprue has been filed off. Examine the edge closely.

The second coin is also rough, but enough of the obverse design remains to question the design style, and this leads the thinking to consider it as a cast fake.
It seems to have a brassy color, almost all copper based ancient Greek coins are bronze, not brass.

OK for the price. I keep an extensive collection fake ancient coins for my own education, to defend myself against fakes. If you have any doubt about the probability of a coin being fake, then only offer a dollar or so for it.
Better to miss a genuine bargain, than be caught with a very expensive fake.

When I got the coin 'in hand', it reminded me of some scrap metal pieces I'd seen in a slag heap in the early-mid 1970's(?) The scrap metal pieces also had a porous look like they'd been too hot (or too cool) and not been given enough time to cool, or cooled quickly... I have some awful looking coins in my collection, mostly from being in the ground, some from having rotten flans to start with, and some which were cleaned by "dolts" - and none had this kind of surface. I'm still inclined to keep the coin in the questionable/fake part of the collection (which now consists of this coin :-) There is a plus, or epilogue to this story: It spurred my interest and researches into the ancient Olympic Games. I've done extensive "work" on the modern Games; however very little on the ancient Games. In terms of coins, now, I keep an eye out for ancient coins with an Olympic theme or symbol - like Philip's 3 wins in Equestrian events.