Log in or Sign up
Coin Talk
Home
Forums
>
Coin Forums
>
Error Coins
>
Why is machine doubling not worth much?
>
Reply to Thread
Message:
<p>[QUOTE="19Lyds, post: 827651, member: 15929"]How about this for an example of Major Machine doubling?</p><p> </p><p><img src="http://i164.photobucket.com/albums/u8/lcl1119/IKEs/DDO%20vs%20Machine/1971-SMotto00.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p> </p><p>Below is an example of a true doubled die.</p><p> </p><p><img src="http://i164.photobucket.com/albums/u8/lcl1119/IKEs/DDO%20vs%20Machine/1971-SProofMotto00.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p> </p><p>Even though the MDD image shows nice "doubling", note the lack of serif splits indicating that the device was "slightly smeared" as the coin was made instead of actually doubled on the die as it was being made.</p><p> </p><p>Die's are made with multiple squeezings from a hub. After the first impression is made, the die gets annealed and then a second impression gets made. If the relief is still not good enough, the die gets annealed (heated to soften it) again and a third impression is made.</p><p> </p><p>If any of the impressions are not lined up exactly, then a "second" or "third" set of devices (letters, profiles, etc.) gets created. This is indicated by the splits in the serifs which can readily be seen on the above image. Identifiable "separation" is what to look for on doubled die coins.</p><p> </p><p>Machine doubling could be likened to using a rubber ink stamp. Make a single, clean impression with the stamp, and the resulting ink image is clean. Add a slight twist as you make the impression and the resulting image gets distorted.</p><p> </p><p>The exact same thing occurs during the minting process.[/QUOTE]</p><p><br /></p>
[QUOTE="19Lyds, post: 827651, member: 15929"]How about this for an example of Major Machine doubling? [IMG]http://i164.photobucket.com/albums/u8/lcl1119/IKEs/DDO%20vs%20Machine/1971-SMotto00.jpg[/IMG] Below is an example of a true doubled die. [IMG]http://i164.photobucket.com/albums/u8/lcl1119/IKEs/DDO%20vs%20Machine/1971-SProofMotto00.jpg[/IMG] Even though the MDD image shows nice "doubling", note the lack of serif splits indicating that the device was "slightly smeared" as the coin was made instead of actually doubled on the die as it was being made. Die's are made with multiple squeezings from a hub. After the first impression is made, the die gets annealed and then a second impression gets made. If the relief is still not good enough, the die gets annealed (heated to soften it) again and a third impression is made. If any of the impressions are not lined up exactly, then a "second" or "third" set of devices (letters, profiles, etc.) gets created. This is indicated by the splits in the serifs which can readily be seen on the above image. Identifiable "separation" is what to look for on doubled die coins. Machine doubling could be likened to using a rubber ink stamp. Make a single, clean impression with the stamp, and the resulting ink image is clean. Add a slight twist as you make the impression and the resulting image gets distorted. The exact same thing occurs during the minting process.[/QUOTE]
Your name or email address:
Do you already have an account?
No, create an account now.
Yes, my password is:
Forgot your password?
Stay logged in
Coin Talk
Home
Forums
>
Coin Forums
>
Error Coins
>
Why is machine doubling not worth much?
>
Home
Home
Quick Links
Search Forums
Recent Activity
Recent Posts
Forums
Forums
Quick Links
Search Forums
Recent Posts
Competitions
Competitions
Quick Links
Competition Index
Rules, Terms & Conditions
Gallery
Gallery
Quick Links
Search Media
New Media
Showcase
Showcase
Quick Links
Search Items
Most Active Members
New Items
Directory
Directory
Quick Links
Directory Home
New Listings
Members
Members
Quick Links
Notable Members
Current Visitors
Recent Activity
New Profile Posts
Sponsors
Menu
Search
Search titles only
Posted by Member:
Separate names with a comma.
Newer Than:
Search this thread only
Search this forum only
Display results as threads
Useful Searches
Recent Posts
More...