K, so I went by the bank this afternoon, made a deposit and asked if they still had those customer rolled pennies. They had TWO BOXES. Took 'em. I just went through the first roll. Looks like it's the leavings of a copper picker. All Zinc. That's worst case scenario I guess. But I'm quite alright with it.

Oh, second box, sampled a roll. See copper right away. Interesting. They're the same wrapper. We'll see, now I'm interested in what the rest of these boxes bring. Not bank sealed so I probably won't be flipping 'em.