to CCF. I agree it has been plated. Yes a plated coin will weight more,but such a small amount you would need a scale that at least goes to 0.001 or even better 0.0001. Check eBay sold third party slabbed missing copper plating,PCGS or NGC or ANACS to see what a real un-plated cent looks like.
( I'm no pro, it's just my humble opinion )
Searched 5+ Million Cents Since 1971