1993 Penny Offset Or DD (Better Pictures)

The movement of the metal during the strike exceeds the ability of the plating to "stretch" that far (especially at sharp device and field junctions near the periphery where he metal movement is greatest.) so the plating splits and a gap opens up. So then why does it not happen on all zincolns all years and MM's? Thanks all.
John1

good 1

This coin is not the result of plating split doubling (though it may have been a contributing factor for some of the exposed areas).

This is the result of the coin being in an acidic environment; under a washing machine where cleaning agents collect, in a cup holder where coffee and soda gets spilled, in any area where chemically enhanced road salt is used, etc.

This is a SAD truth.

Slamnbass,

On the subject coin I do not see any evidence of slight movement of the die(s). With that said, the coin is in awful fad condition from the acidic environment so who knows -- but doubtful.

this is a completely other coin NOT as the same as I posted at the begging of this topic, but on this coin looks like what you are explaining in your comments that you are posting I know its difficult from a picture to come to a conclusion of what it is. it just donsent look like what you are explaining, it might be and I am sorry I cant explain it as I see it cause don't know the correct terms or maybe I don't know how to show you in word form .

That is just what I described as split plating on the mint mark area. The plating split and now the zinc is getting air and starting to deteriorate. The gray you are seeing is the zinc planchet underneath the plating. Note on the loer right edge under the mint mark and area raising? That is where the zinc is swelling upward. I've seen this many times:

The breakdown is now happening to your coin.

It's split plating, just like Coop said. Evidently the copper plating was a bit thinner than normal, facilitating an usual amount of splitting.