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1988-D DDO Or Machine Doubled?

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chriseug's Avatar
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10 Posts
 Posted 10/06/2020  01:42 am Show Profile   Bookmark this topic Add chriseug to your friends list Get a Link to this Message Number of Subscribers
Hi- ran across this coin because of the notch, then noticed the high bump on the D that looked like doubling. Closer inspection shows the following. Thoughts? Looks different than the two on variety vista if it's actually a DDO, and all the others on here don't have this kind of definition. (Also, any feedback on a notch like this is appreciated.) Thanks &

1988-D-DDO-Or-Machine-Doubled?
1988-D-DDO-Or-Machine-Doubled?
1988-D-DDO-Or-Machine-Doubled?
1988-D-DDO-Or-Machine-Doubled?
1988-D-DDO-Or-Machine-Doubled?
1988-D-DDO-Or-Machine-Doubled?
Edited by chriseug
10/06/2020 02:22 am
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spru's Avatar
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 Posted 10/06/2020  01:56 am  Show Profile   Check spru's eBay Listings Bookmark this reply Add spru to your friends list Get a Link to this Reply


It looks like what is called "split plate doubling", which is not really an error. The copper plating splits during the strike and exposes some of the zinc core. This can lead to corrosion and bubbling around the splits, which can look like doubling because of the way it follows the letters/numbers.
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chriseug's Avatar
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 Posted 10/06/2020  02:28 am  Show Profile   Bookmark this reply Add chriseug to your friends list Get a Link to this Reply
Thanks- I looked into several split plate/stretching examples. Just in case, I added one more image, almost looks like a D struck on top of a 45 degree S, but I assume that just wouldn't happen (?)
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coop's Avatar
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 Posted 10/06/2020  08:50 am  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
Also DDD on the last '8'. When the zinc is exposed, the clock is already ticking the countdown for the life of this coin.
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Coinfrog's Avatar
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 Posted 10/06/2020  09:00 am  Show Profile   Bookmark this reply Add Coinfrog to your friends list Get a Link to this Reply
Really pronounced DDD here.



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ijn1944's Avatar
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19219 Posts
 Posted 10/06/2020  12:47 pm  Show Profile   Bookmark this reply Add ijn1944 to your friends list Get a Link to this Reply
Split plate doubling, and emerging zinc rot in the immediate vicinity of the mint mark may suggest a 'S', but that's not a legit S mint mark.
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