1989-D Lincoln Surface Q? - Coin Community Forum

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Author	Replies: 6 / Views: 1,116
pendrak Valued Member United States 253 Posts	Posted 02/20/2019 11:00 pm Hi Guys- What type of errors, or not, are on this coin? Yes, I see the possible Machine Doubling on both the obverse and reverse. My question is about the small bubble looking that covers all surfaces of both the obverse and reverse. Please let me know and thank you for your reply- Report this Post to the Staff

SilverStackerKid Pillar of the Community United States 6478 Posts	Posted 02/20/2019 11:05 pm These are gas bubbles underneath the copper layer. As Zinc deteriorates, it creates the gas bubbles you see on the surface of the coin. This is very common on Zincolns and doesn't add any value. Report this Post to the Staff
pendrak Valued Member United States 253 Posts	Posted 02/20/2019 11:15 pm Thank You! Report this Post to the Staff
John1 Moderator United States 56855 Posts	Posted 02/21/2019 04:52 am It's not so much gas bubbles,it is debris trapped between the zinc core and the copper plating.Most likely zinc dust. I think what you are calling MD on the date is DDD. On the reverse is also split copper plating. John1 Report this Post to the Staff
SilverStackerKid Pillar of the Community United States 6478 Posts	Posted 02/21/2019 06:47 am I didn't know that about zincolns, I thought they were just gas bubbles. thank you John1 Report this Post to the Staff
Errers and Varietys Bedrock of the Community United States 74555 Posts	Posted 02/21/2019 11:00 am You also have Die Deterioration Doubling on the date as well. Errers and Varietys. Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 02/21/2019 11:12 am The darker color on the obverse is from a fingerprint. It is not going away. It is permanent. No premium for this coin. Report this Post to the Staff
	Replies: 6 / Views: 1,116

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