Machine Doubling (Slide Type)

[jcuve]

The following example is a 2001D Lincoln Cent exhibiting Machine Doubling, Slide Type. This coin is from Mike Diamond's collection.

One can see the coin is misaligned NE and then the secondary movement (i.e. slide) went toward the SW. According to M. Diamond, " The die or die assembly was exceedingly unstable and oscillating. The obverse (hammer die) was actually well-centered when it contacted the planchet. It slid into its misaligned position as the downstroke was completed. This scraped clean the area between the filed and the original design rim." While editing the pictures I realized that the coin remains a perfect circle despite appearing otherwise. M. Diamond also stated, "After the downstroke was completed, but before the retraction began, the hammer die moved to the southwest. This last movement scraped through the die-struck design, distorting it horribly and piling up metal in a series of ridges."

Hopefully the photos demonstrated much of what has been stated in regard to the final sliding movement and the metal being piled up and the grotesqueness of poor Lincoln's face, the date, LIBERTY and much of IGWT.

http://i732.photobucket.com/albums/ww322/jcuve/2001DMD_Slide_a.jpg

http://i732.photobucket.com/albums/ww322/jcuve/2001DMD_Slide_c.jpg

http://i732.photobucket.com/albums/ww322/jcuve/2001DMD_Slide_b.jpg

[jpl6332]

Great Job Jason...what we need is a big pointer from the main page to the education section which shows all of these great examples you spend your valuable time producing. Excellent work.

[JeanK]

Great job Jason!
I totally agree with Jeff on this. You have given us a gift of learning that is easily seen, better understood, and more informative than ten thousand sentences.
Thank you to everyone who has loaned their coins or pictures to Jason for the posts.
Jean

[RWBILLER]

Jason:
I wonder if this 1951P is slide doubling on obverse.
thx
roger

[jcuve]

Jason:
I wonder if this 1951P is slide doubling on obverse.
thx
roger

I'm not sure Roger. Are there piles of metal that look like a miniature snow-truck plowed them all the same direction?

[jcuve]

Great Job Jason...what we need is a big pointer from the main page to the education section which shows all of these great examples you spend your valuable time producing. Excellent work.

Great job Jason!
I totally agree with Jeff on this. You have given us a gift of learning that is easily seen, better understood, and more informative than ten thousand sentences.
Thank you to everyone who has loaned their coins or pictures to Jason for the posts.
Jean

Thanks Jeff and Jean! Glad to hear that my fellow LCRers appreciate the work I put into my collages and of course a big thanks to the those collectors who trust me to shoot their coins for them.

[JeanK]

You both know that I tend to 'see things' in a lot of these anomalies... so, with that said. If I look at the southeast portion of Roger's coin and turn it end for end, I see a reverse image of Lincoln's bust, a die clash of sorts. That would include what you see on the back of the neck at the collar. As for LIBERTY, that has me befuddled, and may require an in-hand examination by someone much smarter about these things than little old me.
Jean

[jpl6332]

This is one messed up puppy, this one went through the ringer! Jean if I saw that thing I would not know what to do except throw it in the "look at later bin" maybe!

[mikediamond]

Jason:
I wonder if this 1951P is slide doubling on obverse.
thx
roger

I inspected this coin. My conclusion was that it had somehow been tampered with. The pattern of doubling is reminiscent of that seen on "rippled" coins, although far less extreme. The surface has an odd appearance overall. Note also the dent over the "5".