View attachment 547377 I found this 1988 D over D penny, I am a bit of a novice so I was wondering if anyone could give me more info about it and what it might be worth
Sorry, but no, it's not D over D. It's just damage. It's poor plating and zinc rot aggravated by a hit to the coin.
Take a toothpick and press on the spot. It will pop releasing the gas trapped underneath from the rotting zinc.
Yes to Zinc Rot as stated I want to share this webpage with you - http://www.error-ref.com/zinc-deterioration-on-lincoln-cents/ Worth - 1C