Today in my roll searching I found a 1991-D and a 2006-D Jefferson nickel with copper wash on the obverse and reverse of both coins. No real value on these however it is nice at times to find a odd looking coin while searching. The value is only 5 cents but nice to find just the same, you can learn more about this type of coin by doing a search at the top of the page. There is also another type called sintered plating error you can also go here http://www.cointalk.org/showthread.php?t=6606&highlight=copper+wash+nickels .Doug has done a lot of work and put a lot of info into are search data base take the time to do some research there. Bruce.