It's lamination. It's very common on wheaties. It actually lowers the value since it can't be graded.
Just because it can't be graded doesn't mean it lowers the value. In fact, I have seen slabbed examples with "error: lamination" sold before. Lamination errors definitely can sell for a premium.
hmm.. I can't think of an example where a laminated piece would sell more than its counterpart.. but I'm sure there are people out there. My 22-D came back in a body bag from PCGS. I forget if NGC does the same