IMO nothing more then plating blisters with zinc rot, you will find alot of them on cents made after 1982. The mint change over to 95% zinc and 5% copper. JMO Dave
yup, plating blisters and split plating with zinc rot around the mint mark...no collector value http://www.error-ref.com/blisteredplating/
I'm trying to figure out why you think it could be a "die" clash. It's important to understand what the terminology is before just throwing it out there.
