Tweet
1971 S Penny - Is this just mechanical doubling or DD?
I’m still learning how to tell a DD and mechanical doubling apart 100% so please bear with me! I honestly think this one is a mechanical doubling but because it’s an older kind of worn penny I can not tell for sure as the “doubling” is not really shelf like appearing (but maybe that it due to it being worn, i’m not sure). Input would be appreciated!
-
-
Mechanical doubling. Notice the shelf like appearance. Look at this site and see if that helps you. https://www.ngccoin.com/news/article...hine-Doubling/
Proud Member: CONECA, TEC, HVNS, NS, ANA -
Originally posted by Cmorg View Post
Here is another.
John Wexler has some excellent articles on doubled dies vs. mechanical doubling.
http://doubleddie.com/144801.html
I have a few articles in my signature as well.
Gary Kozera
Website: https://MintErrors.orgComment
-
The other clue here is to look at the mint mark. It has the same md. Since it was added by hand to the finished die it wouldn't show true doubling that's on the die.Comment
-
Hello James,Originally posted by Jamez View Post
Interesting NGC Piece about "Doubling vs machine doubling"?.. The Romania 1951 Lei?? with both "Doubled Die and Mechanical doubling mix, raises a question?.
Does the Value of Coin or premium price impacted by machine doubling in this case?, or it does not affect??. ThanksComment
-
No machine doubling IS machine induced damage. In my opinion it shouldn't add value, but it may take some of it away.
There are coins that have been attributed as a variety and machine doubling, but I am sure they could have had more value without the worthless doubling.
A coin with just machine doubling is overly common, especially in the 1940-1970 range, within the USA.
IF there are three coins of the same type next to each other, each graded by a third party grading service, in my opinion:- The coin with the just the variety would probably sell first
- The coin with the variety and the machine doubling (worthless damage) might sell - it puts people's confidence in what it is on the fence. Questions and uncertainty arise.
- The coin with just machine doubling (worthless doubling) would probably never sell. People attempt to hype these up or attribute them incorrectly. One wonders if they will be held liable for mis-attribution. Some may say they might be taking advantage of people who do not know the minting process or value of coins.
Last edited by MintErrors; 01-11-2023, 12:51 AM.Gary Kozera
Website: https://MintErrors.orgComment
-
Originally posted by Gcantrell7 View Post
An important clarification point:
That typically applies to coins prior to say 1995-ish. YES, I realize the OP coin is 1971, but I want to clarify, the comment was generic. It's nice to clarify than to confuse.
The US mint added the mintmark to the master hubs in the mid 1990's to eliminate the existence of re-punched mint marks (RPM's). Point is the damage is evident on the mint mark as well. After 1995-ish, if you see doubling on the mintmark, it could be part of the doubled die if it is eventually attributed as such.
The US Mint's method in which they make dies also changed. After 1995, the single squeeze technique, and what many call "doubled dies" is technically incorrect. They only perform one impression on the die with the single squeeze method. Prior to 1996, IF the dies required more than one impression to show all the details of the coin , some were doubled with two or more impressions and if they were offset enough, they were attributed as doubled dies.
As I have mentioned before, I am not a fan of Zinc cents nor the Single Squeeze technique varieties....
Last edited by MintErrors; 01-11-2023, 01:12 AM.Gary Kozera
Website: https://MintErrors.orgComment
Comment