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1987 P Memorial Cent Machine Doubling Tutorial! (For Starters Mostly)

 
 
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 Posted 11/06/2018  9:06 pm Show Profile   Check Errers and Varietys's eBay Listings Bookmark this topic Add Errers and Varietys to your friends list Get a Link to this Message
So today we will be talking about Machine Doubling. I see questions about Machine Doubling a lot, so I am going to talk about it. Anyways, let's get started! With Machine Doubling, the size of the devices are usually reduced, and the doubling is shelf like in appearance. This is caused by the die bouncing off the surface of the coin, and then landing in a different spot. They call it Machine Doubling, because the machine itself causes the doubling. I have also drew lines on some of the pictures to show you the reduction of the devices. I have also captured some pictures on the side, to show you the step like appearance to the Machine Doubling, on the devices. On a real Doubled Die,the device size is always increased in size, never reduced ever. A real Doubled Die happens, when there's a mistake in the die making process, usually a misalignment between a working hub and a working die. See the difference? Hopefully, this will help everyone, including the new members.













Here's a real Doubled Die. Notice how the device is increased in size? All coins struck by a Doubled Die (hub doubling on the die) will show this same exact doubling, from that affected die itself. A Doubled Die is caused by a mistake in the die making process, not by the strike. Machine Doubling will never do this nor look like this.


Errers and Varietys.
More information about Die Deterioration? http://goccf.com/t/317950
Retired U.S. Mint Coin Die Set information. http://goccf.com/t/302961
1988 P LMC RDV-006, 1998 P LMC Wide AM, and 2000 P LMC Wide AM. http://goccf.com/t/327834 http://goccf.com/t/294303 http://goccf.com/t/312900
1973 D Lincoln Memorial cent With Recurring Die Subsidence Error Information. http://goccf.com/t/304624
Machine Doubling tutorial. http://goccf.com/t/332421
Die states progression on coins. Scroll down, so you can see the different die state progressions. http://goccf.com/t/325638
Edited by Errers and Varietys
11/06/2018 9:55 pm
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United States
6857 Posts
 Posted 11/06/2018  9:38 pm  Show Profile   Bookmark this reply Add SilverDollar2017 to your friends list Get a Link to this Reply
Nice write-up E&V, definitely will help members who want to learn about MD vs doubled dies

One thing I'd like to mention. (I'm nitpicking, I know. )


Quote:
the size of the devices are always reduced in size


Coop explained that there is a type of MD, called push doubling. It can increase the devices in size but has characteristics that distinguish it from a true doubled die. Just thought I'd mention that.
Collector of all classic US coinage.

How to identify cleaned coins: http://goccf.com/t/319679
Bedrock of the Community
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United States
13655 Posts
 Posted 11/06/2018  9:43 pm  Show Profile   Check Errers and Varietys's eBay Listings Bookmark this reply Add Errers and Varietys to your friends list Get a Link to this Reply
Thank you for your feedback SilverDollar2017! I'll fix that.

I fixed it and put "are usually reduced in size". I am not an expert by any means, but have a lot of knowledge about certain stuff. Please let me know if there needs to be more changes, since this is just a brush up lesson from my mind. What do you think of this change SilverDollar2017?
Errers and Varietys.
More information about Die Deterioration? http://goccf.com/t/317950
Retired U.S. Mint Coin Die Set information. http://goccf.com/t/302961
1988 P LMC RDV-006, 1998 P LMC Wide AM, and 2000 P LMC Wide AM. http://goccf.com/t/327834 http://goccf.com/t/294303 http://goccf.com/t/312900
1973 D Lincoln Memorial cent With Recurring Die Subsidence Error Information. http://goccf.com/t/304624
Machine Doubling tutorial. http://goccf.com/t/332421
Die states progression on coins. Scroll down, so you can see the different die state progressions. http://goccf.com/t/325638
Edited by Errers and Varietys
11/06/2018 9:53 pm
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United States
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 Posted 11/06/2018  10:31 pm  Show Profile   Bookmark this reply Add Spence to your friends list Get a Link to this Reply
Nice write-up. If these are all your images then fine, but if you have "borrowed" them from others, then I would advocate for giving the appropriate people credit for their photos.
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
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United States
6857 Posts
 Posted 11/06/2018  10:31 pm  Show Profile   Bookmark this reply Add SilverDollar2017 to your friends list Get a Link to this Reply
Looks great. Also, I'm no expert.
Collector of all classic US coinage.

How to identify cleaned coins: http://goccf.com/t/319679
Edited by SilverDollar2017
11/06/2018 10:32 pm
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United States
13655 Posts
 Posted 11/06/2018  10:37 pm  Show Profile   Check Errers and Varietys's eBay Listings Bookmark this reply Add Errers and Varietys to your friends list Get a Link to this Reply
Don't worry Spence. It's all good. These are all of my images that I took and edited, using a program from Windows 10. Also, thank you SilverDollar2017 once again for your feedback! This thread will serve its purpose.
Errers and Varietys.
More information about Die Deterioration? http://goccf.com/t/317950
Retired U.S. Mint Coin Die Set information. http://goccf.com/t/302961
1988 P LMC RDV-006, 1998 P LMC Wide AM, and 2000 P LMC Wide AM. http://goccf.com/t/327834 http://goccf.com/t/294303 http://goccf.com/t/312900
1973 D Lincoln Memorial cent With Recurring Die Subsidence Error Information. http://goccf.com/t/304624
Machine Doubling tutorial. http://goccf.com/t/332421
Die states progression on coins. Scroll down, so you can see the different die state progressions. http://goccf.com/t/325638
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United States
1281 Posts
 Posted 11/07/2018  12:10 am  Show Profile   Bookmark this reply Add Bate to your friends list Get a Link to this Reply
Very nice E-n-V. Thanks for spending your time helping newbies all the time. You are #128077;
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United States
13655 Posts
 Posted 11/07/2018  12:19 am  Show Profile   Check Errers and Varietys's eBay Listings Bookmark this reply Add Errers and Varietys to your friends list Get a Link to this Reply
You're welcome Bate! I'll be working on more stuff like this in the future.
Errers and Varietys.
More information about Die Deterioration? http://goccf.com/t/317950
Retired U.S. Mint Coin Die Set information. http://goccf.com/t/302961
1988 P LMC RDV-006, 1998 P LMC Wide AM, and 2000 P LMC Wide AM. http://goccf.com/t/327834 http://goccf.com/t/294303 http://goccf.com/t/312900
1973 D Lincoln Memorial cent With Recurring Die Subsidence Error Information. http://goccf.com/t/304624
Machine Doubling tutorial. http://goccf.com/t/332421
Die states progression on coins. Scroll down, so you can see the different die state progressions. http://goccf.com/t/325638
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