Sometimes, just a plain ol' hit from a plain ol' object can end up looking like something special even though it's just a plain ol' hit from a plain ol' object. I doubt if there is anything extra stamped over the original image, and in my opinion, you'd have a Devil of a time figuring out what it is/was, and even a harder time trying to prove it. I believe that most error collectors want an error that's easily discernible and easy to explain and understand how it came about. I don't think any error collector wants to have to use his imagination in order to "see" a particular error. But that's just me. Thanks for posting Freddie.