I found found this coin also which has doubling on the date 1980, LIBERTY, and IN GOD WE TRUST. All pictures can be viewed here http://s744.photobucket.com/albums/xx83/tarsdaddy/Error Cents/1980 Lincoln Penny Doubled Obverse/ My first post is "1988 D Doubled Obverse and Reverse".
machine double or strike doubling...you can tell becuase the doubling looks like a flat shelf off to the side of the letters and numbers...on a true double die the secondard numbers or letters are the same height as the primary.
Here is an example of a coin I pulled out of a double mint set. The doubling of the date is very prominent so I got excited but then in looking for the variety I learned that this was strike doubling...and actually pretty common on this date as both 1957-D's in the set had the doubling. You can clearly see how the doubling looks like a short shelf to the right of the first strike. Unfortunately this is considered damage and does not add any premiums to the value.
On the ddo coin I can't see the doubling but easily see the machine/strike doubling. What am I missing? Since I can't see it I'm afraid to get rid of any dates/mm that might have dd.
It can get really frustrating when you see doubling and get told it's damage. I've listed a few links below that will explain the differences. Generally, (but not always), the dodoubling you want to find that's of value is at the same height as the primary devices. Machine doubled letters and numbers are lower than the height of the primary devices because it is the device that is sheared hence the flatness that is evident. Hope this helps. http://koinpro.tripod.com/Articles/OtherFormsOfDoubling.htm http://www.lincolncentresource.com/FAQ/machinedoubling.html http://www.pcgs.com/articles/article771.chtml
