1987-S Lincoln Cent - Doubling Error?

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Author	Replies: 6 / Views: 1,207
aboarman Valued Member United States 132 Posts	Posted 07/03/2011 4:38 pm I recently came across a 1987-S Proof cent that shows doubling on the obverse of the coin, primarily around the mint mark, date, the "LI" in LIBERTY, and GOD. I am attaching a photo of the coin. At first look, it may appear that the doubling you see is simple light glare, but I have examined the coin myself at high magnification, and the doubling is definitely there. It can also be seen when viewed from the sign, which tells me that the doubling is the result of a mis-strike or something. I would very much appreciate it if you might have a look, and even more get back with any info you may have. Thank you! Adam Report this Post to the Staff

amida17 Pillar of the Community United States 4897 Posts	Posted 07/03/2011 7:06 pm I know you discounted it but how many light sources did you use for the pics? Report this Post to the Staff
aboarman Valued Member United States 132 Posts	Posted 07/03/2011 10:35 pm One light source, from the right. The color of the apparent doubling is almost white, as in the pic. Also, notice how the "S" is "doubled" to the lower right, while in "GOD" it's to the upper side. Report this Post to the Staff
Metalman Pillar of the Community United States 7123 Posts	Posted 07/03/2011 10:42 pm This really looks like split copper plating to me, more of a quality issue than anything else. what you are seeing is the zinc core. I don't see any doubling in the pics. Report this Post to the Staff
amida17 Pillar of the Community United States 4897 Posts	Posted 07/03/2011 10:48 pm Kinda what got me is the "doubling" looked like it was random in direction. Thought maybe just eds plating issue. But I'm no expert. Report this Post to the Staff
aboarman Valued Member United States 132 Posts	Posted 07/03/2011 11:00 pm Ahhh - split plating! For some reason that never crossed my mind, but it makes a lot of sense. Thanks! Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 07/04/2011 02:02 am Die deterioration. It affects all devices facing the rim. Report this Post to the Staff
	Replies: 6 / Views: 1,207

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