It is called a spender. A VLDS (Very-Late-Die-State) die struck the coin. (Note on the mintmark area the horizontal lines above and below the mintmark? Those are called die flow) A lot of circulation wear on this coin. When you get a chance check out Variety Vista to see what to be looking for on a variety coin. Then you will spot what to look for: Variety Vista has no listing for a DDO DDR for this year mint: http://varietyvista.com/04a%20JN%20...201955-D.htm RPMs: http://varietyvista.com/05%20JN%20R...%201955D.htm Looks these up and see what DDR or a RPM would look like this year/mint. On the DDR the spreads are harder to see on these. On the RPMs, note that the affected areas of the RPM are raised as high as the mintmark, enlarging the size of the mintmark. Get to know what to look for. We use maps all the time to know how to get to where we are going? Why not read on the variety sites, what to look for.