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What Do I Call This Fault?

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New Member

New Zealand
28 Posts
 Posted 06/20/2015  06:41 am Show Profile   Bookmark this topic Add MUDEKI to your friends list Get a Link to this Message Number of Subscribers
Trying to update some photos for my website and have photographed some of the 20 or 30 odd New Zealand 20 cent coins I have from 2008 with this error but have also found one minted in 2014.

I have called the fault a metal stress error but does this appear in other countries coins and does it have a name and does anyone know what causes this?

Forgot to add all these coins are taken from rolls that are rolled at the Canadian mint so have not been tampered with in anyway


What-Do-I-Call-This-Fault?

What-Do-I-Call-This-Fault?

What-Do-I-Call-This-Fault?
Edited by MUDEKI
06/20/2015 06:49 am
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Altaira's Avatar
Canada
2517 Posts
 Posted 06/20/2015  07:26 am  Show Profile   Bookmark this reply Add Altaira to your friends list Get a Link to this Reply
I have seen this on Canadian coins of any denomination except the penny. I've always assumed that it's a plating problem since I don't see them in non-multi-ply plated steel coins. Not sure what caused it in the first place though.
New Member
New Zealand
28 Posts
 Posted 06/20/2015  08:11 am  Show Profile   Bookmark this reply Add MUDEKI to your friends list Get a Link to this Reply
Thanks for that. It does not seem to be very common it has taken me a few years and a disturbing amount of rolls sorted to find what I have.
Valued Member
lovecoins's Avatar
United States
331 Posts
 Posted 06/20/2015  08:49 am  Show Profile   Bookmark this reply Add lovecoins to your friends list Get a Link to this Reply
it comes from pitting on the original die
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ChildOfTheWheat's Avatar
United States
5828 Posts
 Posted 06/20/2015  09:08 am  Show Profile   Bookmark this reply Add ChildOfTheWheat to your friends list Get a Link to this Reply
I think its a plating issue. You sometimes see this on zincolns, though its not as dramatic.
Valued Member
United Kingdom
109 Posts
 Posted 06/20/2015  3:01 pm  Show Profile   Bookmark this reply Add Beeston1990 to your friends list Get a Link to this Reply
As lovecoins mentioned..
New Member
New Zealand
28 Posts
 Posted 06/20/2015  5:15 pm  Show Profile   Bookmark this reply Add MUDEKI to your friends list Get a Link to this Reply
I thought that when I first found the fault but as every one I have found is different (unique) it cant be a die fault. I record die progression in my collection so I can follow how they deteriorate. Sad really lol but I am lucky enough to get new coins in bulk often from the same die pairing.
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