Nice coin--the portrait and eagle are strong strikes! 
Regarding billon or potin, I've read these coins described interchangeably; I wouldn't know how to tell.
I've read potin described as bronze with higher tin content, sometimes lead and antimony. Short of lab equipment, I don't know how you would tell.
Regarding billon or potin, I've read these coins described interchangeably; I wouldn't know how to tell.
I've read potin described as bronze with higher tin content, sometimes lead and antimony. Short of lab equipment, I don't know how you would tell.






















