1994-D Missing Copper Layer Or Plated?

@ DATA:

I always say you are the real encyclopedia of articles, studies and etc. The article you mention and also you state ask for more technical check (I say) must be perform. Normal, un-plated coin struck it is not a small error and I know hundreds of collectors which want.

Now this coin (for extra plating I come later) . ZINC: molecular structure: almost cubic. Rolls of zinc could have linear lines. Normal. A blank is done, go to annealing, the lines become smaller.
No plating, OK. Go to press. Indifferent if the blank or the die has lines, due to the structure of the material, those lines will be broke and become as small dots (not best word, maybe as sand blast). It is this for pure Zinc.

If Cu platted, then we will see the out layer of the coin texture which accept lines due to the molecular structure.

This coin I do not believe was mercury or lead, I believe just boil in a solute for color. This will not add weight.

This it is my theorem here.

PS: I remember years ago, Ken Potter wrote. Stanton contradicted in one direction and Mike in other direction. End: Ken: To follow; Stanton I stand with combination of three and Mike : I stand. Years after was find all have some reasons in that error and to day all three theorem are a package. No one wrong but no one perfect.

@ DATA:

I do not know where you find the words, but I know you made narrative for all. Man it is a beauty to read you, not me LOL. In medical, science and technical we are probably to direct and peoples consider me and others to rude. Thanks ,

@silviosi Thank you for your input, not sure where excitement is coming into this conversation, its about learning how to identify these types of errors and any other potential error that gets posted. I used this site to gain experience and to share cool finds as well. I have had plated coins before, Cents, Quarters, and Half Dollars. This is the first one that has that mint luster. Most plated coins I have had didn't show cartwheels like this one. Matter of fact I don't recall ever seeing cartwheel luster like this on plated coins. My question is if a unplated Zinc planchet was struck and found in almost BU condition, would this unplated Zinc Cent show the mint luster like a regular Zinc Cent? Also this coin is not as reflective as other plated coins I have had over the years. With that being stated this still could be a Plated LMC which I am still leaning that way. The first photo is more how the coin looks in hand, but with cartwheels. I glad you are very confident in your opinion what you think this coin is. That is where I am trying to get. Thanks again.

I was rooting for you, even though I had my doubts. Keep up the search and I look forward to your next find.

Dearborn I had to do a scratch test. It was driving me crazy not knowing. I think even if it was a true Unplated Zinc that tiny scratch would not hurt it too much. Back to searching and learning.

@ arby96

Your last pic show some Cu.

Now your question about the cartwheel. I say basic all the coins (Blanks), indifferent of the compositions or procedures as: clad or plating will pass the Blank polishing. Base on those procedures must be a cartwheel. After strike the difference will come from the type of Die polishing.

WEIGHT: Theoretically an unplanted coin must be less. TRUE = NO. Why? because a thicker planchet will balance the weight. So is necessary to look at the coins from many aspects and not just go ONE idea.

Me I do not state it is re-plated. I state has the characterizes of a coin boil in special solute which will detach Zn ions to the surface and broke the Cu ion and complete the Zn molecules with CU. This it is names semi reverse engineering of electroplating.

ARBY: we all learn every day till we go. Also in that moment, the last we will learn that we had only one life not two as we believed.

I will give you private with the tracking No.