Check here, but I didn't see any like yours. But it is the early hours here in Spain http://varietyvista.com/01c LC Doubled Dies Vol 3/DDRs 1999D.htm
Wow! My first impression was raised, but looking closer at the shadows I'm not sure. Some parts like they're raised but other parts do look like a recessed. Any idea how I can tell without potentially damaging it?
If the lighting source is coming from the right, and the darker part of the lines is also on the right, I would think it’s a scratch, because what you are seeing on the right then is a shadow. Hopefully that makes sense. if it was raised, the right side would be lit up, and not a shadow.
Yeah - it can be hard to tell, even under magnification. Here's something you can do. As mentioned by Luckyr, look at the shadows. Take another pic with a single light source (say, from the left). Then look at the results. Here's a crude sketch of the four columns (in profile) from your photo of the Memorial. With the light coming from the left, the red parts will be lit and the grey parts will be darkened. The part in question is between columns 2 and 3 (see arrows). If that "groove" is incused, then its right side will light up. If it is raised, then its left side will light up.
Thanks for the suggestions. I had been using a light source from straight above. I'll see if I can get some pics with a source coming from the side at a slight elevation relative to the penny. I will post them once I have them.
Okay, I believe it is recessed but I'm still not absolutely sure. For the most part, a UV light seemed to show the clearest reflections and shadows. If recessed, I believe this means it's not a double die. First, would you agree it is recessed, and then thoughts about how something like this happens will be appreciated. Also, does it seem to be a significant error?