Found a almost BU penny with a black blemish on the back and In God We...Is missing but is extremely*** faint, you have to study it closely and you can see an incomplete ghost of the letters, Also the LI in Liberty is very weak. Does anyone know the value of this? I am guessing $1-$5
Probably a grease strike. I've seen quite a few of these "errors" in many different years. They don't command much of a premium :( If you're able to post a photo, you'd probably get a better answer.