View Full Version : lincoln cents
sullivan3150
08-12-2010, 07:48 PM
I have a 1988-P double in the face around the lips
Thanks
John
4181
wavysteps
08-13-2010, 12:33 PM
From what I can see, it is machine doubling. I did magnify the coin picture, but it pixelated before I could get any real magnification.
BJ Neff
sullivan3150
08-13-2010, 01:09 PM
Have you seen any more like this. I found it with three others of the same year in a penny roll.
Thanks
John
wavysteps
08-14-2010, 09:37 AM
Machine doubling occurs when the newly struck coin bounces back up into the retreating (hammer) die. When the coin does strike that die, the design element affected is flattened slightly, giving it the appearance of doubling and extra thickness. This problem is caused by a loose die or dies. So, it is possible to have a series of strikes, where the coin will bounce up into the die and have the same area affected for each strike.
BJ Neff
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