Proof coin US Penny with manufacturing flaw I have a 2002 U.S. proof set the penny has a flaw in that the zinc coating has bubbled Is there value based on this flaw?

Their is no standard value for coins with gas bubbles, I have never seen or heard of proof coins with this defect but that don't mean it's not common. I do strongly suggest showing it to as many collectors and dealers as you can and do more research. It may take some time but I think it will be worth it.