| Author |
 Replies: 13 / Views: 2,377 |
|
|
Valued Member
Australia
271 Posts |
I was going through my discarded pile and came across this 1942I. It has a almost symmetric little ring on a couple of the reverse denticles. I am curious to know whether it is a die crack, PMD, or something else? I though it might have been hit with a punch of some sort. All thoughts welcome.    |
|
|
|
Pillar of the Community
Australia
852 Posts |
|
|
Pillar of the Community
Australia
4411 Posts |
|
|
Valued Member
 Australia
271 Posts |
Thanks for the replies, Enworb & Nealeffendi. Amazing how the small denticle can spread so far!
|
|
Valued Member
Australia
216 Posts |
Hi Guys, I'm more than happy to be told I'm wrong on this but I don't see how this could be PMD. I'm thinking that it's a Cud. I mean when you look at the last photo, the close up, I don't see where the metal could have come from to create the raised blobs if it is PMD. Guys, help?  Peter |
|
Valued Member
Australia
216 Posts |
Hi Guys, I'm more than happy to be told I'm wrong on this but I don't see how this could be PMD. I'm thinking that it's a Cud. I mean when you look at the last photo, the close up, I don't see where the metal could have come from to create the raised blobs if it is PMD. Guys, help? Peter |
|
Pillar of the Community
Australia
674 Posts |
|
|
Valued Member
Australia
216 Posts |
Maybe, but that does not explain where the metal came from. With a nail punch I'd expect to see a clear imprint on the end of the punch.
|
|
Pillar of the Community
Australia
852 Posts |
I can see where the metal came from. The denticles have lost metal, it hasn't been flattened out but pushed up to form those 2 lumps. Also explins why the gap between the 2 denticles has not pushed up metal. Sorry,no Cud just PMD |
|
Valued Member
Australia
216 Posts |
Ok, I think I see what you are saying Neal. Thanks for pointing it out to me. Strange that the punch moved all that metal in "one" direction to the end of the denticle instead of just flattening it out. (not arguing, just thinking how this PMD happened) It's interesting to think about the "how" this happened at least for me. Cheers guys |
|
Pillar of the Community
Australia
750 Posts |
It had me intrigued too Peter. I was thinking something very hot like the tip of a drill bit perhaps as its picked up and repositioned the copper. Very unusual.
|
|
Valued Member
Australia
271 Posts |
I was hoping that someone would say "well, it looks like a tiny washer has fallen off the machinery, and been stamped into the coin", but alas. The coin seems to have been struck with a similar force to what it would have received during the minting process. I believe that whatever it was, it was leaning on the rim when struck, so that the force was at an angle,hence the metal has flowed a bit more to the other end. Just thinking about it now, I would have thought that a punch would have scarred the rim to some degree.
|
|
Pillar of the Community
Australia
750 Posts |
I can understand what you're hoping happened Sfitzernator. I think if it was done at the time of minting the thin denticle (big arrow) would not have been there and would especially not be flattened like it is. That denticle alone indicates to me that it's happened post minting. The thin line (small arrow) is what makes me think something like a drill bit has hit it.  |
|
Valued Member
Australia
271 Posts |
Quote:
I think if it was done at the time of minting the thin denticle (big arrow) would not have been there and would especially not be flattened like it is. That denticle alone indicates to me that it's happened post minting.
Common sense done got me!  Check out the base of the next small denticle to the right. That looks like a drill bit scar. |
| |
Replies: 13 / Views: 2,377 |
|
Posted 08/10/2013 6:12 pm
