Though many are looking for the big one, the S mint mark. 69D does have a Doubled die. Yours looks like strike doubling. Here is a reference. http://varietyvista.com/01b LC Doubled Dies Vol 2/DDO 1969-D.htm
Hi James welcome to CT in the future when you post here, always post both side of coin. Also be sure to crop out any back ground and always select full image when you post. I agree it appears to be SD Dave