1971 D Kennedy - What causes this feature?

If it doesn't fit anywhere else, POST IT HERE. Numismatic related posts only.

Moderator: Daniel

Forum rules
Here's a link to how to post a topic with images in our community https://coinauctionshelp.com/welcome-to ... community/

___________________________________________________________________________________________________________

You also agree to follow these guidelines. You must agree to these rules to be a member of this forum. NO SPAM! Spam is deleted within minutes, no spam will ever be left in our community.

1. Post a front and back image of your coin with a specific question about what you’re seeing or asking about and one coin per topic.

2. Please remove coin from the holder unless it’s US or an official mint case or unless it is graded by a grading service.

3. Images should be taken by a camera or cell phone camera, we ask that members don’t use images through a microscope screen.

4. Always start your own topic, please don’t ask about your coin or post your coin in someone else’s coin topic.

5. Do not send private messages about your coin unless an Admin ask you too and the same for sending emails through the board.

6. No spam. Do not post any links to your coin or other non-coin websites.

7. Always be respectful even if something makes you upset or you don’t agree with a member. You can always get a second opinion elsewhere. If you have an issue then politely ask an admin in an PM. PM’s are for issues, technical and personal, but not for coin questions (refer to number 5 on this list). Our community is not a soap box for complaining or drama, so please refrain from doing so here.[/size]
Post Reply
Message
Author
AMG
Coining Around
Posts: 7
Joined: Thu Oct 08, 2020 11:05 pm
Has thanked: 7 times
Been thanked: 2 times

1971 D Kennedy - What causes this feature?

#1 Unread post by AMG »

What causes this, for lack of a better term, 'halo effect' around the lower half of Kennedy's bust? I see this same feature on some of the Kennedys on PGCS. The whole texture of the coin is grainy, but that grain is minimized in the halo, thus reflecting the light differently. I assume something in the process of striking the coin causes this, but the feature isn't evident on all the coins I looked at. I rather like this coin, it's fairly pristine looking. Thanks in advance for the education.
Attachments
20201008_225804.jpg
20201008_223653.jpg
20201008_223915.jpg
20201008_224610.jpg
20201008_224739.jpg

User avatar
SensibleSal66
Coin Master
Posts: 7734
Joined: Thu Sep 10, 2020 8:06 am
Location: Connecticut
Has thanked: 3502 times
Been thanked: 2304 times

Re: 1971 D Kennedy - What causes this feature?

#2 Unread post by SensibleSal66 »

What kind of holder is it in ?
Member of CONECA
" All replies are my opinion based on experience"
Casual Collector 40+ years , 10 years Error coins ( still learning).

User avatar
SensibleSal66
Coin Master
Posts: 7734
Joined: Thu Sep 10, 2020 8:06 am
Location: Connecticut
Has thanked: 3502 times
Been thanked: 2304 times

Re: 1971 D Kennedy - What causes this feature?

#3 Unread post by SensibleSal66 »

I'm not an expert but maybe it is Oxidation ( if that's possible on Clad) OR "toning " . Not gonna hurt value.
Member of CONECA
" All replies are my opinion based on experience"
Casual Collector 40+ years , 10 years Error coins ( still learning).

User avatar
Daniel
Administrator
Administrator
Posts: 26230
Joined: Wed Jan 28, 2009 4:59 pm
Location: Ohio
Has thanked: 1123 times
Been thanked: 4093 times
Contact:

Re: 1971 D Kennedy - What causes this feature?

#4 Unread post by Daniel »

It's die deterioration. You're see the metal flow lines from a die that is breaking down.

AMG
Coining Around
Posts: 7
Joined: Thu Oct 08, 2020 11:05 pm
Has thanked: 7 times
Been thanked: 2 times

Re: 1971 D Kennedy - What causes this feature?

#5 Unread post by AMG »

Ah, thank you Daniel. Sal, it's just in a cardboard flip.

User avatar
Paul
Master Die Variety Examiner
Master Die Variety Examiner
Posts: 18828
Joined: Wed May 29, 2013 9:19 pm
Location: Wisconsin
Has thanked: 897 times
Been thanked: 3272 times

Re: 1971 D Kennedy - What causes this feature?

#6 Unread post by Paul »



The "Halo Effect" that you are seeing, is the result of die polishing....
Notice the radial striations in the fields ...... as they are indicators of a late die state strike.
C.O.N.E.C.A. Wi State Rep
Fly-In Club Wi State Rep

Post Reply
  • Similar Topics
    Replies
    Views
    Last post