@fake_eagles
you have to test, to determine if those coins consist of .999 silver or not. If coins are .999 silver, I do not see any huge financial advantage for someone to counterfeit redeemed silver coins, and make .999 silver replicas. (unless it is Casascius redeemed silver coins
)
To my eyes, those Sol Noctis Eagles doesn't seem necessary fakes. Those coins might be "seconds" ie. coins that were rejected from quality checks (due to scratches, dents, blurry, blemish etc.), never loaded, and after 7 years, Mint of Poland instead of melting them, decided to sell them to a merchant at wholesale -near spot-, as silver rounds.
Prolly they sold way less than 2009 coins with holos, and they can get away with that (since the certificate says mintage
up to 2009 coins), by selling the rest (up to 2009) as silver rounds (without holo)...
This might also explain the fact that there are no remnants of the holo, since prolly a holo never applied. (+ the reason that some parts of this coin is blurry/not very smooth in comparison with the loaded coin you have in your possession)
that's just my theory/opinion (I do not have any proof), and I might be totally wrong.
Mint of Poland might be the one that could be able to provide some explanations (about the status of those coins), instead of the Ebay seller.
Edit: the backside of the coin, is different from the well known "fakes" in circulation, since there is no address engraved, and no btc symbol inside the holo area. This is how a fake looks like:
