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2009 us mint set proofs

Has anyone seen these us mint proof sets of 4 2009 proof pennies made with 90 percent copper and 5 percent zinc that have silver toning? Are they considered errors?

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    Rc5280Rc5280 Posts: 1,430 ✭✭✭✭✭

    No, just the usual caramel/darker colored toning for me.

    Here's mine below, now it's your turn to show us the silver toning (picture or link please)...
    .

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