you'll want to show the entire coin both front and back. Remember *always* post pictures of the entire coin. if you compare it to websites with DD http://www.varietyvista.com/01b LC Doubled Dies Vol 2/DDO 1974-D.htm http://www.varietyvista.com/01b LC Doubled Dies Vol 2/1974DDDO001.htm
I bet its machine doubling. Sorry, but its probably worth face value unless the date is under 1982. Then you get 2 cents for copper value!