The is called die deterioration. You can find it often on the Zincolns on the devices closest to the rims. On the obverse left side of LIBERTY,...
It is split plating. The zinc underneath is starting to raise upward as it is getting air. [IMG] [IMG] [IMG]
The incuse devices on the quarter are machine doubled. They are reduced in size on the incuse doubled die dies. The machine doubled incuse devices...
I found a nice DDR in a proof roll. I have many images, but I'll post the last one to see anyone is interested. [IMG]
Looks like the location of the RPM is similar to 1960D-1MM-120...
[IMG] image from heritagecoins.com
A larger image migh show what you have. The 1944 cents had master die doubling on the date area. [IMG]
Do you have a before image? That might help a lot for the discussion.
Here is a rim cud: http://www.error-ref.com/rim-cud/
The double line on that area is called a collar clash. The raised area is a rim cud coming from a break in the collar making the rim cud.
Looks like a rim cud. Nothing on the die is affected yet.
When looking at these wheat cents from the 40's - 50's, you have to consider they over used the dies in that era. They had a lot of events that...
Looking at your image of UNITED, I don't see any hub doubling in that location? Recheck your image of the UNI I posted and see the difference in...
One marker to check for is on the "O" on ONE. [IMG]
[IMG] [IMG]
More of the same machine doubling. The EPU should be enlarged if it is machine damaged. On incuse devices, the hub doubling shows as reduced in...
Still normal. There is something going on NE on those initials. But it is not a doubled die.
Looks like your coin is suffering split plating under the SE edge of the mint mark. When the plating splits, then the zinc starts to deteriorate,...
Looks like machine damage to me. (Some call it machine doubling, but nothing is doubled, just damaged) The 2013-P had a great DDR: [IMG][IMG]
They probably wouldn't be worn everyday. The devices would wear down quicker on these rings.
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