1940 S (2.4g)?

This pennie is old and worn, never the less its copper 1940s but it only weighd 2.4 grams? If u see the picture i weighd out a 1973D and that came out to 3.1g can anyone educate me on this?

 

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Looks like it was dipped in acid. This is the reason it's lighter.
Not a Mint Error. Damaged.

also.. When you create a thread there is really no need for a Poll.
Do not add the Poll.

Tambien.. se llama un penny, no es pennie.

 

So this is why it weighd 2.4g? d

 

Yes.. The acid eroded the copper. That is why the image looks mushy.

Here is a webpage with information - http://www.error-ref.com/acid-shrunk-coins/

 

Acid dipper is my vote also.
Reed and Sparkles the Unicorn

 

Hi Paul, yes I agree with the acid. Place that coin on top of the 3.1 g coin and see if it is the same diameter and thickness. If so, maybe something else, but if not, then acid. The acid reduces the metal from all directions, not just thickness, but that is the most noticeable. Jim

 

I hate to admit this, but I probably soaked a few bucks worth of change in nitric acid back in the 80's when I was in college. If you find an acid damaged coins dated in the 80's in the North East, it may be one of them.