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 Replies: 8 / Views: 9,914 |
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Valued Member
United States
105 Posts |
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Pillar of the Community
United States
744 Posts |
before the smart ones give the answer away.... I would say Machine Doubling.... if it was struck more than once, more devices would have the doubling I believe I'll see if I pass my test |
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Pillar of the Community
United States
4008 Posts |
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Pillar of the Community
United States
7629 Posts |
Well, here's the deal on this... double struck in collar and Machine Doubling - can - pretty much be the same thing, with the Machine Doubling being the much more minor of the group, and the double-struck in collar being the much more major of the group. Machine Doubling, usually caused by die bounce, can also be caused by two strikes on a coin while it remains in the collar. if little or no rotation occurs between the strikes, you end up with a coin like the one in this thread. If the coin totates, even 10-20 degrees, you end up with a vastly different looking error...and vastly more valuable. As it stands - whether this be a simple case of die chatter (die bounce) in one strike or a genuine double strike (with very little coin movement between the strikes), the result is about the same - slight Machine Doubling that wouldn't bring much - if any premium. added - and this definitely is NOT a doubled die. Edited by coppercoins
03/07/2011 5:22 pm
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Valued Member
 United States
105 Posts |
Thank you for your explanations! I learned alot from your posts and I really appreciate you taking the time to respond.
Chris
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Pillar of the Community
United States
2752 Posts |
This is a clear case of Machine Doubling. The flat, marginal shelving is characteristic of the "push doubling" subtype. The die bounced, shifted laterally, and landed lightly on the freshly-struck design. It's almost always possible to distinguish Machine Doubling from a double strike. Error coin writer and researcher.
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Valued Member
United States
105 Posts |
Thanks, Mike for the detailed explanation.
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Pillar of the Community
United States
7629 Posts |
Mike - ALL due respect and not intending to cause a debate here...I would honestly like to know exactly HOW to tell the difference. Is it the slight scraping of metal inside the flattened area that distinguishes the two? Perhaps - just maybe - is it possible for a die bounce to be clean enough so as not to be discernible from a total re-ift of the die with a second strike that's almost in perfect alignment with the first?
Oh...I think I could be thinking through the answer to my own question, but let me give it a shot...
Even if there is some lift in die chatter, the result will STILL only be on one side of the coin. If it really is a complete lift-off double strike with slight misalignment between strikes, the flattened doubling will be on BOTH sides of the coin...
Do I get a cookie or am I wrong here?
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Pillar of the Community
United States
2752 Posts |
You are basically correct. In rare instances a very light second strike can be confused with a strong case of Machine Doubling (push doubling subtype). However, a true second strike will leave other evidence of doubling besides a marginal shelf on one side of the central design. Error coin writer and researcher.
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Replies: 8 / Views: 9,914 |
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Posted 03/07/2011 5:16 pm
