Error Plating | Partial plating or PMD?

[Historyhound]

Just found this while CRH'ing. Having a hard time telling if it was like this when struck or if there is something else going on here. The outer edge of the coin is unplated except for the area by the date. But, the obv and rev rim, appears to be plated all the way around. Under magnification, it does not exhibit any trace of acid damage. I'm perplexed. Any theories?

[jallengomez]

Just found this while CRH'ing. Having a hard time telling if it was like this when struck or if there is something else going on here. The outer edge of the coin is unplated except for the area by the date. But, the obv and rev rim, appears to be plated all the way around. Under magnification, it does not exhibit any trace of acid damage. I'm perplexed. Any theories?

I'm not seeing it, but what you are describing sounds like plate split doubling. Jason has an excellent article about it as well as photos here:

http://www.errorvariety.com/OFD/PSD.html

[Historyhound]

I'm not seeing it, but what you are describing sounds like plate split doubling. Jason has an excellent article about it as well as photos here:

http://www.errorvariety.com/OFD/PSD.html

Sorry, but this isn't even close. Nothing appears to be split, nor is there any doubling.

[jallengomez]

Sorry, but this isn't even close. Nothing appears to be split, nor is there any doubling.

I may be missing something that is very obvious, but I'm not seeing any missing plating. Where on the coin are you seeing it?

[Historyhound]

I may be missing something that is very obvious, but I'm not seeing any missing plating. Where on the coin are you seeing it?

This should simplify it. Why is the coin mostly silver in color and not copper?

[jallengomez]

This should simplify it. Why is the coin mostly silver in color and not copper?

Tell me what kind of lighting you used for the pictures and I'll try to white balance it in photoshop, but I'm seeing a normal Cent. There are simple chemistry experiments though to turn a Cent silver(and gold). Here's how it's done:

http://www.youtube.com/watch?v=_g_ml8tAnWE

[jallengomez]

Okay...the lighting is very warm, but I think I see the big picture now...post mint would be my guess.

[copperlover]

Could be chemical affecting parts of the coin or the metal composition was not consistent.

lucien

[jallengomez]

Althought the copper plating is thin, if it were a plating issue you would see a definite deliniation where the remaining copper bordered the underlying zinc. Looks like a smooth transition from the photos, so as copperlover pointed out it's probably a chemical alteration.

[jcuve]

I would agree it seems more like the existing plating was altered by way of chemical or heat, but I really cannot say for sure without maybe a closeup photo of a transition area. As Jody pointed out, the plating has a definable thickness and there will be a particular transition between the two surfaces. If there is such a transition, then we'll need the coin's weight.

[jfines69]

I recently came across a coin covered in black except for a few spots on the edge... The black substance came off while cleaning the coin!!!