Possible DDR, probably not. lol

[wapa]

I found this last week and finally getting around to posting some pics. The marks on the columns are interesting. Any ideas what they might be?

[jcuve]

It might be from die wear, and somehow influenced by either an ancient die clash or just from that progressive, indirect design transfer (or internal metal displacement phenomenon). The doubled areas are right where you'd see Lincoln's upper back and neck. Maybe Bob will want to see it...

PIDT (IMDP): http://error-ref.com/Progressive_Indirect_Design_Transfer_.html

[mustbebob]

This appears to be a combination of MD and Die Deterioration. It does not have any characteristics of hub doubling.

[wapa]

I found this 1987 D a couple of days ago and it resembles the 85 D in this thread almost exactly. Is this a common wear pattern. They wouldn't use the same dies for two years would they? I had to post this as it seemed so coincidental and was curious how this could happen.

[jcuve]

It seems to me we have seen examples like this, and it was concluded to be either odd MD or die wear each time. Thinking about it, Crawford showed an example and stated it was die wear too. I don't think it is a DDR, but I cannot figure out if it is MD or DDD for 100%. I lean toward DDD as you can see flow lines on the doubled part of the column on both of your examples.