Of what I can see your coin has what is reffered to as "Machine Doubling" which causes a "Flat " step next to the edge of a design feature. Check this site out, lot of good info.http://www.varietyvista.com/
Not me... I have since retired from that position (I got tired of the whiners (new members) complaining about my "obnoxious" DD explanation posts)
Got you covered on this Paddy. By the way, the proper Numismatic Terminology is “Doubled Die” with a “d” at the end of Double. Which means that the “Die” used to stamp a coin was slightly rotated when the “Die” was being made. Most other forms of “Doubling” come from “Die Chatter”, “Machine Doubling” and worn dies which create “Die Deterioration Doubling” when the “Coin” is being made.