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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