1960-D BU cents with Damage from a bag

[MintErrors]

I recently bought a 1960-D bag of 5000 cents and I have pulled more than a handful that look like this;

What's the correct definition of this?

Typically Greasers show up in more than one area and look splotchy

Is this simply a metal shavings filled die that eventually pounds its way into the planchet ?

Here are different five examples;

http://www.minterrors.org/wp-content...1/DSC07337.jpg

http://www.minterrors.org/wp-content...1/DSC07338.jpg

http://www.minterrors.org/wp-content...1/DSC07339.jpg

http://www.minterrors.org/wp-content...1/DSC07341.jpg

http://www.minterrors.org/wp-content...1/DSC07340.jpg

[diamond]

Looks like some debris was stuck to the die and either moved around or degraded as the series of coins was struck.

[MintErrors]

Mike,
So it could be a filled die, or a Struck through an object?

[diamond]

While I can't rule out "grease", my sense is that the foreign material was more substantial. Beyond that, I can't speculate on its nature and origin.

[MintErrors]

I'm looking to see if I can find a pattern in the coins that have this issue.
I'll see if there is a way to pick out a few and start a series of photos that show some sort of transition, from a nearly normal coin to one with significant damage.

I probably have 2 rolls so far. I'll look them all over, make sure they are from the same die if markers are present and put a link in here eventually. I am about 60% through the bag, so it shouldn't be too long.

[diamond]

Sounds like a worthwhile investigation.

[MintErrors]

Here is a link to a 14 coin series of what I think is in order of degradation.

I have over 50 of these, most only have significant degradation to the "60", and about 10 or so are of the dramatic damage beyond the "60" of the date.

http://www.minterrors.org/?p=286

[diamond]

Seems reasonable to suppose that the more heavily affected cents represent the beginning of the progression.