I just received from work today (I'm in retail, good place to have hands on change) a penny that seems to be very light in weight and different sound when dropped, so I'm thinking the steel penny. Now, that being said it should be silver in color but looks like copper but it's so much crud on it. Which from reading about the few copper coated steel pennies that did escape into circulation, was wondering if this may be one . Only thing is, it's pretty dirty and looks like corrosion, if that is what it is, looks more like a lot of gunk. What is a safe way to clean it? Should I or could I let it soak in some sort of soap and water, peroxide (probably not that) but something to get a view of date and color without damage. Many thanks sorry so long.
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