Here is a 1988 quarter with reverse cud. Coins like this one are circulating so keep your eyes open for them. This 1988 has seen some circulation. I’d wager that it has been in thousands of pockets & purses before it got pulled from circulation. It is not listed in my cud books. Here are a couple links describing cud errors: http://coins.about.com/od/coinsglossary/g/cud_defined.htm http://rareerrorcoins.com/cud-errors/ Thanks for letting me share. Post ‘em if you got ‘em.