Nope.. DDD - Die Deterioration Doubling Not a Doubled Die And there is no such thing as a Double Died. That is incorrect terminology.
yeah but we're talking about a penny here. oops, meant to link the Frog ... but with the different pic I also see it's not.
I believe what you're seeing here with the mint mark is split plating which is quite common with copper plated zinc cents IMO http://www.error-ref.com/split-peeling-plating/
Copper usually has blue towards black coloration when it chemically reacts, Zinc such as zinc oxides are insoluble compounds, used in paint, sunblock, diaper rash protection, and dilutes the blue green coloration. The only photo it seems to shine is post # 8, and that is from too much brightness I suspect. Only you have the coin in hand, but it appears to be split copper plating and chemical reaction of the underlying center metal. Jim
