What's the deal with these big pennies?---We found three of them that are slightly larger in diameter than the "normal" ones.----I looked in my Yeomans Red Book but didn't see anything stated about them.----The three large ones we found are 1982, 1989 Phillys (P) & a 1992-D.-----They aren't beat up, flattened out or anything--just larger diameter.------Got the wife & I curious!