I have seen quite a few coins similar to this and believe it to be die deterioration doubling, not a doubled die, sorry. Keep up the hunt!
Heres a real answer to your question http://doubleddie.com/719776.html check if your is the ddo for that year, also keep in mind, that new ones are being found everyday ! Watch-out who answer your post , this person gives the same answer most of the time !!!!!!
thanks Rick the link you directed me to was the info i needed to get a better understanding of the double die.
heres is one more site for you, book mark them so you have them for later use http://varietyvista.com/CONECA Master Listings.htm
I like that the tpg attribute the nicknames to the labels . http://www.numismaster.com/ta/numis/Article.jsp?ArticleId=6022 http://www.ebay.com/gds/Top-10-Rarest-State-Quarters-/10000000204826056/g.html
If you are talking about the "Quarter Dollar" then that is machine doubling. No added value. For more info, Google "machine doubling" here is one source: http://www.lincolncentresource.com/FAQ/machinedoubling.html