Unique 2011 Gettysburg Quarter

I have a 2011 Gettysburg Quarter but I have not been able to fine one like this. One side is two toned (Gold and Silver). I have looked online and found similar coins that are all silver or all gold and there are others that even have colors but I have not been able to find one like this. Does anyone know if this is a unique coin or if there are many others like it?

 

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Aftermarket colorizing. It destroys any numismatic value a coin might have had. Sort of like this: http://www.merrickmint.com/america-the-beautiful-parks-quarters.html

 

Thanks, I have seen others like the examples in the link but did not realize it was aftermarket.