Note all the affected areas are on the sides of the devices facing the rim.
DDD. Die aging Note that the affected areas are on the fields and not enlarging the actual devices. Second clue for
DDD. If this were a doubled die, then the devices would be enlarged in the center of the devices, not outside of the devices. A doubled die would show an enlarging of the on the die, thus the term double
d.
Note the differences between a normal die and a doubled die. The devices are wider in the centers of the devices. Not enlarged by split plating. Note the 'ST area outside on TRUST. Also you see die flow lines on this area. Just another sign of die aging. Seeing the images aide by side, helps to train the eye what to look for.
Note the enlarging on the doubled die on the date area. What causes this, the way the die was created. The doubling was on the doubled die, not caused by die aging, or machine alteration of the already struck devices. (
Machine Doubling) The doubling is on the die, thus the term doubled die. Also note the mintmark. After 1990 there are no more RPMs. But post 1990 if the mintmark is affected, it is not a RPM, but part of the doubled die.
Why? The full design is all on the hub, and if the die was doubled, it would show doubling on the areas where the hub doubling created an error. So no more RPMs, because the mintmarks are part of the design, not something added to the design on coin until 1990.
So your coin is not from a doubled die, but from an aging die. As the die ages, it shows this by creating
DDD (
Die Deterioration Doubling) The way to spot this is: Looking area between the devices and closest rim area. Is there an affect there? Yes. So it is not a doubled die.
CoopHome :
What is the differences between a doubled die and DDD?Edited by coop
03/17/2021 09:16 am
Posted 03/17/2021 08:44 am
Uncirculated American Silver Eagles 
