D/S OMM In 1990 Lincoln Cent? - Coin Community Forum

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Author	Replies: 7 / Views: 1,232
littlecoin New Member United States 33 Posts	Posted 03/04/2017 02:01 am I've read conflicting information of when the mint marks became part of the die...I hear it was 1990. Then I read doubleddie.com says, as I understood, that they started in 1990 but continued to some degree until 1994, when ALL dies included the mint mark making it impossible to get RPMs without doubling of other parts of the obverse or OMMs. I'll provide the link to the doubleddied.com page in my reply post if it's ok with the forum. IN any case...I found this 1990 Lincoln cent/penny that has what seems to be an S under a D. Appreciate all opinions and teaching :) Here are the images. Report this Post to the Staff

Fuzzy317 Moderator United States 14463 Posts	Posted 03/04/2017 02:06 am An S mint mark should be about the same size as the D, so I don't think what you have traced is an S mint mark. Can you get your images clearer? Report this Post to the Staff
littlecoin New Member United States 33 Posts	Posted 03/04/2017 02:11 am Thank you, Fuzzy317. I'm going to try to get a better pic. Wish me luck. I need an USB microscope I guess! Report this Post to the Staff
littlecoin New Member United States 33 Posts	Posted 03/04/2017 02:37 am how about this pic? Report this Post to the Staff
cwb Pillar of the Community United States 3463 Posts	Posted 03/04/2017 02:46 am to the forum! It is a 1990-D damaged cent. It appears the damage is from Zinc rot. It is impossible to have an RPM or an OMM (Over Mint Mark) on a US cent after 1989. The same is true for the US Nickel. Other coins stopped using the hand punched mint marks in 1990 I believe. Edited by cwb 03/04/2017 02:47 am Report this Post to the Staff
littlecoin New Member United States 33 Posts	Posted 03/04/2017 02:51 am Oh well I tried ...I'll go back to my pile of coins..and maybe throw away everything from 1990 and later. Even the 2017 Lincoln cents have spots ty so much for the input you all! sending these rotten babies to a bubble gum machine (if I can find a penny one!) Report this Post to the Staff
spru Bedrock of the Community United States 12477 Posts	Posted 03/04/2017 03:12 am Yes, from what I understand, 1990 was the cutoff. Anything before had separately punched MMs and coins from 1990 onward have the MM as an original part of the die. Split plating on Zincolns is most prevalent around the MM and date so it could be caused by the zinc core corroding or, there is a possibility of a die chip in that area. Edit: Viewing it again, I think it may be a die chip in the D. I don't see anything in the potential zinc-rot area near it on the coin. I do see the grayish areas from split plating but, essentially no bubbles. In Memory of Crazyb0 12-26-1951 to 7-27-2020 In Memory of Tootallious 3-31-1964 to 4-15-2020 In Memory of T-BOP 10-12-1949 to 1-19-2024 Edited by spru 03/04/2017 03:20 am Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 03/04/2017 11:31 am The 1990 coins had the mint marks added to the design since then. So no more over mint marks or RPMs. The eyes often take over and we think we see something that is not there. I agree with the assumption that this is a split plating issue and the zinc raised after the coin was struck. It may have even happened during circulation. Report this Post to the Staff
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