Coin Community Family of Web Sites Join Thousands of Coin, Bullion, & Money Collectors
Coin, Banknote and Medal Collectors's Online Mall Join Thousands of Coin, Bullion, & Money Collectors Royal Estate Auctions - $1 Coin AuctionsRoyal Canadian Mint products, Canadian, Polish, American, and world coins and banknotes. 300,000 items to help build your collection! Vancouvers #1 Coin and Paper Money Dealer Specializing in Modern Numismatics








Username:
Password:
Save Password
Forgot your Password?


This page may contain links that result in small commissions to keep this free site up and running.

Welcome Guest! Registering and/or logging in will remove the anchor (bottom) ads. It's Free!

1957 D Quarter With RPM Over Horizontal D?

To participate in the forum you must log in or register.
Author Previous TopicReplies: 20 / Views: 3,311Next Topic
Page: of 2
Valued Member
3193zd's Avatar
United States
292 Posts
 Posted 08/01/2017  10:11 am  Show Profile   Bookmark this reply Add 3193zd to your friends list Get a Link to this Reply
Can you tell me what happened to this coin? How did these scratches get there they are raised. Is this from die buffing?

1957-D-Quarter-With-RPM-Over-Horizontal-D?
1957-D-Quarter-With-RPM-Over-Horizontal-D?
1957-D-Quarter-With-RPM-Over-Horizontal-D?
Bedrock of the Community
coop's Avatar
United States
62064 Posts
 Posted 08/01/2017  10:32 pm  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
Most of the time die scratches will affect just the fields on the dies. Some polishing lines may have done by a different process. I've always wondered if they used something like a wire brush or sand paper on the die, leaving these longer lines st different angles than normal die flow lines would be. These lines in time will flatten in the die with continued use. But where the lines at a different angle are next to a device or inside of a device they will remain for a lot longer in these areas. But the die that stuck the above coin is showing die flow lines near the bust area. So it may have been worked on to remove something, but not over polished, because the die flow lines are still there. When the die flow lines are there and the die scratches are strong like on your coin, then they are fresh die scratches. In time the ones in the open fields will flatten out.

The lines on the cheek look like coin scratches from circulation or a previous cleaning with an abrasive on the coin. (These devices of the cheek are deeper into the die, thus not usually affected by die polishing) I've seen marks on the steps of the memorial that look like a wire brush was used and affected the mid depth devices.
1957-D-Quarter-With-RPM-Over-Horizontal-D?
Edited by coop
08/01/2017 10:37 pm
Valued Member
3193zd's Avatar
United States
292 Posts
 Posted 08/02/2017  12:12 am  Show Profile   Bookmark this reply Add 3193zd to your friends list Get a Link to this Reply
so these scratches are from human work not die flow. I am trying to get a feel for what is from Die Deterioration and what is from man trying to maintain the die.
Bedrock of the Community
coop's Avatar
United States
62064 Posts
 Posted 08/03/2017  10:03 am  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
The man altered lines run in a direction that is not normal for die flow. Die flow tends to run from the center and heads for the rim area.
Valued Member
3193zd's Avatar
United States
292 Posts
 Posted 08/03/2017  10:50 am  Show Profile   Bookmark this reply Add 3193zd to your friends list Get a Link to this Reply
got it! thanks Coop!
  Previous TopicReplies: 20 / Views: 3,311Next Topic
Page: of 2

To participate in the forum you must log in or register.



    




Disclaimer: While a tremendous amount of effort goes into ensuring the accuracy of the information contained in this site, Coin Community assumes no liability for errors. Copyright 2005 - 2026 Coin Community Family- all rights reserved worldwide. Use of any images or content on this website without prior written permission of Coin Community or the original lender is strictly prohibited.
Contact Us  |  Advertise Here  |  Privacy Policy / Terms of Use

Coin Community Forum © 2005 - 2026 Coin Community Forums
It took 0.23 seconds to rattle this change. Forums