Out of many pennies i scoured through i found numerous that under magnification with a basic photo lense I found various forms of doubling, pics follow. Some of the pics you have to look hard, lighting made showing the doubling hard. Other pics follow next
so an old worn die will cause machine doubling, im unsure what does it. did you look at them all, not all are the same, at least not for what i can see. What about this one, under magnification it is clearly the same date stamped very close, i hope you can see what i was able to,its easiest to see that the numbers overlap rather than machine doubling were it creates a step like double.
"Unlike genuine doubled dies for which the doubling is on the die itself (hence the term “doubled die”), mechanical doubling is the result of loose parts in the coining press. These loose parts allow the dies to shift slightly at the moment of impact when the coin is being struck. This slight shifting of the dies is what causes the flat, shelf-like appearance of mechanical doubling." See http://doubleddie.com
I don't know, look at the separation on the 4 on the 1984-d in the last pic in the 1st post. Is that a dd or the pic playing tricks?
The 1984-D shows slight plating issues but other than that it is normal. The 1985 shows slight abrasion doubling, and mixed with glare of a light can look like a doubled die, while in reality it is not one. The 1989 looks like a combination of die deterioration doubling and plating issues. The 1996 just looks like a worn die. Hope this helps, keep up the hunt!
