What "type" Of Doubling Is This? 1991 D Lincoln Memorial Cent / LMC

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Author	Replies: 5 / Views: 704
Grelko Valued Member United States 232 Posts	Posted 09/03/2020 06:55 am It doesn't look like Machine Doubling, since the devices don't look reduced. I thought it might have been flat field doubling, but I believe that only happens with proof coins. I slightly turned the coin in 2 of the pictures, so there wasn't as much glare. In the last picture, I had the coin up on an angle to show the "doubling" better. You can see it around the left side and slightly below the IBER in Liberty, plus the 199 of the date. I thought it might have been zinc bubbles, but it doesn't squish. Edit - It looks like some type of DDD or "abrasion" doubling. Edited by Grelko 09/03/2020 07:22 am Report this Post to the Staff

John1 Moderator United States 56855 Posts	Posted 09/03/2020 07:36 am By the date is DDD. You need to work on getting rid of the light glare. John1 Report this Post to the Staff
Grelko Valued Member United States 232 Posts	Posted 09/03/2020 07:46 am I have a digital microscope with the white LED lights coming in a couple days. That should help with all the glare in my pictures. I'm currently using a table lamp with a bulb for a flood light in it haha. Edit - Later today, not in a couple days. I just received an update for it. Edited by Grelko 09/03/2020 07:58 am Report this Post to the Staff
CoinTheTerm Pillar of the Community United States 1161 Posts	Posted 09/03/2020 08:37 am The date is showing Die Deterioration Doubling. Report this Post to the Staff
mikediamond Pillar of the Community United States 2738 Posts	Posted 09/05/2020 10:58 am Die Deterioration Doubling or plating disturbance doubling. I suspect the latter, as he the rest of the coin seems to show a relatively early die state. Error coin writer and researcher. Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 09/05/2020 1:18 pm Liberty is also showing the same DDD. I can tell if the devices are showing it on the tops of the images. But it is also possible to show it their also. Report this Post to the Staff
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What "Type" Of Doubling Is This? 1991 D LMC