1985-D Double Die

Not a doubled die in my opinion. A plating issue. I have or had some for the same date/mm.

Not from what I can see. I see doubling that looks deceptively like hub doubling. It actually fooled a few specialists in the 1980s until they reversed themselves on what it was. I examined 1985-D cents with this effect in 1986 and determined them to not be hub doubling.

Look at the S of TRUST. The bottom loop at first looks something like hub doubling but the primary image on top is of greatly reduced diameter and appears to "cap" the lower underlying portion of the S. This "capping" is a diagnostic to keep in mind.

If it was a doubled die, the primary would be fully formed.

I'm seeing this effect in all your images to a greater or lesser degree but nothing that is typical of split serifs per se.

This effect is due to the plating flowing toward the rim at a different rate than the metal of the zinc core. I was only able to find it on early die state coins but that could have been due to it only being on EDS coins that I had on hand. It should not be confused with plating split doubling, a term I coined in the 1980s to describe plating that was stretched so far during the strike that it often pulled away from design elements leaving the zinc core exposed. However, it could go hand in hand on some specimens.

You can probably find this on other dates but I found them on 1985-D cents most probably because I went through thousands of them.

Now with that said, my analysis is based on your images which quite frankly could be better. I could change my mind if later images suggested that was something else there other that what I think I'm seeing.

Could it be "ejection doubling?"
John1

shouldn't these coins be documented? someone should come up with a mint damaged book or something.

That is funny John. You post a link to Ken Potters web site. What a respectable thing to do.
In all respect you two are on the top of my list as error-variety specialists.
DoubleManFlats, you have your reference. Keep up the hunt!

LOL. You guys are to funny

Heck he was one of the pioneers for the US Modern Variety and Error Coin Scrolls of the Shield nickels and Two Cent Pieces. Lol. I know because I was there.