I recently searched through a roll of BU 1958-D Lincoln cents that I had purchased earlier this year. I was quite pleased to find this interesting planchet error cent. This coin was struck on a 3.03-gram Flawed Planchet, the reverse is where the defect shows up. What looks like a major scrape across the bottom and left side of the reverse is not a scrape at all, and upon closer inspection it is quite apparently a Delamination issue with the planchet. All the places that look like damage have the same textured and a rose-pink color that is very reflective and which is consistent with the surface of a fresh ready to strike planchet. From this I have concluded that the delamination happened before the strike. I have also excluded this from being a Struck-Through Error due to the abnormalities all having the same surface texture. And I have not ever seen a Struck-Through that makes hair line cracks in a coin. All the areas that are this color and texture did not come into contact with the surface of the die that struck the coin, they are all below the field and design elements of the die. As these photo should show. Questions and comments welcome.
Yup, struck on a delaminating planchet. I suspect the planchet delaminated in some areas before strike, and the coin delaminated in other areas after strike.