1987 d penny possible error.

the d looks funny and distorted letters

 

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Zinc rot, PMD, and worn die strike evident by the ridge ring.

 

Looks like Mechanical doubling- no added value .

 

Ok thanks

 

No problem

 

What's a ridge ring? The dings along the rim of the coin? Thanks.

 

@JeffC Here's a photo of a cent with a Ridge Ring. They occur when a die becomes very worn (Deteriorated).

 

Darn Zincolns

 

Or maybe just the beginning of zinc rot.. Common issue on D mint marks in Copper plated zinc cents

 

Nice example. You forgot : No Added Value . " Run Rabbit Run, dig that hole , forget the Sun " something like that. lol

 

@thomas mozzillo , @paddyman98 , thank you.

 

Could be a gas bubble .

 

Not a gas bubble.

The copper plating is very thin and it split around the mm during striking. This was common on Denver coins in the 80s. Once the zinc is exposed, if can corrode like a scratch on a car fender. That's what happened to the coins in @paddyman98 picture.

Here is the explanation from error-ref

http://www.error-ref.com/?s=Split+plate+doubling

 

Sorry, but occluded gas bubbles are strictly only found on solid alloy coins.

 

I see that now, sorry my bad .

 

Interesting, thanks paddyman

 

Your pic's are nice and clear. Is that a cell phone or camera?

 

Nice pic's. You worked at the mint?