Coins struck with a broken die are some of my favourites. I would love to see what is out there, so what do you all have in your collections that have been struck with die breaks. Here is a starter, a 1963 half penny;
(http://i243.photobucket.com/albums/ff235/Blunderstruck/1963halfpenyDBobv.jpg)
(http://i243.photobucket.com/albums/ff235/Blunderstruck/1963halfpenyDBrev.jpg)
(http://www.timeclockmts.com/coins/australia-1961-3d-die-break.jpg)
20c 1966, I don't appear to have a picture of the Obv, but if I ever find the coin, I'll rectify that situation.
(http://i50.tinypic.com/286x3xc.jpg)