search errors on ebay an look at graded coins that were struck on different planchets an see for yourself...
TIM YOU HAVE A WINNER!!!!!!!!!!!! That is the silverest silver cent I have EVER seen. You should totally be able to get at least 6 figures a piece for those coins. First you got like thirty 92 CAMs and now you have stumbled upon all of these amazing silver cents? You must be the luckiest person on the planet. I am in awe of you. Is that what you wanted to hear?
Totally paint or the remnants of a poor plating job.... Coming from someone who has owned many cents struck on dimes (me) this is nothing other than PMD.
The picture itself shows this not to be. Silver is white and copper is not. Not white, not silver. This copper cent has silvered a touch in its golden years.