Hi! Bought a box of foreign coins and found these oddities mixed in with the lot. A Copper Silver and Gold Bullion coin. (Woo complete set! ...of whatever these are.)
The copper one is pretty thick, but the Silver one is wafer thin, thin enough that it does not even have a reverse.
I jumped for joy when I found the "5 grams of gold" bar, but some googling leads me to believe it's just a bar of tin or something, with a wafer thin plating of gold. I'm not sure though, I'm hoping someone else may have more info.
Thanks!

