Do you have any images of a dime that has been improperly annealed that shows the expected luster for comparison?
The laying flat and the vertically oriented dime are supposed to be the same coin. If it is plated and not showing on one it shouldn't be showing on the other either.
I'm not computer-savvy, so no, I don't have any photos handy. If you are attending the ANA World's Fair of Money convention in Chicago this August, I'd be glad to see the coin in-hand there, and give an opinion after seeing the coin. My posts are my opinions and observations - others here have different opinions, and I respect those from known experienced collectors and/or researchers.
Aw man, I wish I were! I'd love for you someone to take a closer look.. maybe the local coin store for now.
OK, I'm not trying to beat a dead horse here. In my view, it's not a mis-annealed planchet from what I can see in the photos. Others can, have, and will disagree.
Someone always will haha, But I certainly appreciate your insight! Thank you! And everyone who has responded!
Even though dead horse has been beat, one more to show the rim comparison in the light, coin in question on the right.
Here are images of both sides. You can see that the obverse die was partially filled with grease and debris around the perimeter. Chris