I have looked at this coin SO many times, with a few different tools. the doubling is not flat and shelf like and when I look at with my 60x loupe the point in question is curved. so if it IS a DD, can the doubling be curved if the letters are flat to begin with?
That is strike doubling. The insides of letters are a very common place for it to occur. You see it on the lower branch of the E in your last pic as well.
the E and the D are not similar. that's why I didn't photograph the E. strike doubling would be flat and shelf like, right? which as I previously stated this is not.
I didn't need it...I used it before taking photos to make sure I wasn't seeing things. and there are PLENTY of DD's that require a higher magnification tool. the 2006 cents aren't as noticeable with a 30x-36x loupe.
I'm thinking this may have more to do with die deterioration than anything else. As far as the look of strike doubling it is important to remember that it will show its "doubling " within the confines of the original design elements size and can look perfectly shelf like or be a bit more rounded. An example of a different look is this 1939-s rpm#1 lincoln that I picked and just got in . The strike doubling on the date and mm has a more rounded look. attachment-2 by stoneman227, on Flickr
I have seen that kind of strike doubling before. You can see the striations where the metal got pushed up
I don't believe our examples are the same. yours is curved INWARD, mine is curved OUTWARD. I hope these pics help.
I apologize for confusing the issue. The photo I posted was only to illustrate a different look for strike doubling, as you had stated that strike doubling should be flat and shelf like. I say again that I feel a deteriorating die played a factor in what you are seeing on your coin.
