When I took it to a coin show I was told that mine was probably the only one like it and to look for 2007 D's with missing R's. He explained that the grease built up and when it released the R flipped and then fell off. So mine and maybe one more just like it but a few more missing R's.
I would like to see some offer's. Because there is only one maybe two out there I would think it should be worth some money.
The lamination is off as well and I do not understand why this was not put into the certification. I think he was busy with other people at the coin show.
I have his information and the certificate in my safe and would be made available upon request.