This is bullion, the silver content is far below 50%, so such test can't say anything. Patina on bullion may be absolutely different colour. I also have such coin fully black.
The details of the coin looks quite normal, lettering is without mistakes...
I think it is genuine coin from this time.
My personal list of scammers from Numista: erniemix, yvain, CassTaylor
Agree could be genuine. This coin have low content of silver. Im not sure if test made by iiruig is reliable. I found a nice article about forgery from the era and they described Christina's solidus as very popular to be a fake. They mention if you have zinc coin then its 99% forgery from the era.
Thank you for your feedback, gentlemen. I tested other coins that supposed to be silver, and the test confirmed it. But indeed billon may have a different patina.
What stops me from thinking that it is an immitation, is quite clear text and details on the coin as it supposed to be.
Though, who knows exactly.
Citação: "iiruig"Thank you for your feedback, gentlemen. I tested other coins that supposed to be silver, and the test confirmed it. But indeed billon may have a different patina.
What stops me from thinking that it is an immitation, is quite clear text and details on the coin as it supposed to be.
Though, who knows exactly.
If it was a counterfeit, the counterfeiter was a genius. The stamp is perfect. Maybe the mint employee was making extra money
 

