Oh, I went through all of them and snapped the ones I could, I figured, if they fake they need to be broken, if they're real, I just made some years become rarer (even though they're not really rare yet).
Most are like '62 or '82. The thing about the ones I posted, I can keep breaking them if I wanted to, but when I take a knife to the discolored edges, they appear to be copper underneath.
It reminds me that they were in a fountain or something and somehow the inside rotted, but not the outside.
I have one or two solid ones where I can feel it breaking inside, but the outside is still too strong to break them.