1960 D LMC Defective Planchet?

[B Smith]

Hello again,
I came across this little oddity this afternoon and I'm struggling to determine what it is exactly, The coin has a real brassy tone to it. I'm wondering if it was struck on a defective planchet or possibly one intended for a different world coin? I would greatly appreciate any opinions.( Wish it wasn't so dirty )
Thanks much! 1960 D LMC 2.8G.jpg 1960 D LMC 2.8G OBV.jpg 1960 D LMC 2,8G REV.jpg

[MintErrors]

I would start by laying this coin down on a flat surface, and putting another copper cent right next to it. I believe that the coin in question might be a tad lower.

The subject coin has all the details all around the coin, to include the rim. That leads me to believe it is one of two things.

With the way the area around LIBERTY, that looks like post mint damage. This coin is circulated, and it is almost impossible to say if it was in the ground suffering from environmental damage, or simply dropped into some sort of chemical or caustic solution.

The other is simply that this is an under weight planchet.

There is no immediate signs, that I can see that it was struck on a foreign planchet.

If i would have to choose one, i would go with acid treated damage, which is post mint damage (PMD).

I have seen hundreds of a I'd treated cents, from put in tomato based solution to other harshly concoctions with cents weight down to 1.x grams.

[B Smith]

Hi Gary,
I took your advise and immediately saw an elevation difference. I wanted to take measurements before replying and, wouldn't you know it, the battery in my digital caliper was dead, as well as the backup. I received new batteries this evening and took the readings. I measured the subject coin from multiple angles and settled upon a head down the middle approach. The subject coin measured 1.38 MM while the control coin, another 1960 D in good condition, measured a thickness of 1.46 MM, measured in the same fashion. I have to conclude that, once again, your analysis was spot on.I owe you a debt of gratitude and maybe one day, should we meet face to face, a nice frosty beer.
As always, I greatly appreciate your assistance. Without it, I would be lost!
Thank you Gary!
Sincerely, Barry Smith