1999 D Penny Possible DDR? Thoughts?

. I'm stupid. Just got into the Coin World. I guess I should pay more attention lol.

Thanks Greasy! My bad.

The alteration of the bays affects the size/shape of the columns. First off, the bays are the same level on the die (the outside face of the die) When the dies are polished to remove die clash lines, they weaken the columns in time. (Polishing can happen few or several times during a dies life) When they are polishing, they may have something they want to remove from the die with what is called isolated polishing. This will reduce deeper into the die. This will make devices go away partially or totally if over worked on a die too much, or too many times. So even the slightest reduction on a die on the fields near the column, will make it look like something is there. Thus that is what we are seeing on this coin. Probably more of an educational piece than a a premium for the coin. Here are a few images I've saved on these over polishings:
The 1968 cents probably have the most over polishing of the '1' on the date than any other year.

Note on the 1968-S RPMs on the first digit:
http://www.varietyvista.com/02b%20L...%201968S.htm
The 002 has the full digit, the 001 has a medium size one, and the 003 shows a stronger over polishing that that digit.

Even a bit more reduced from this one. (This didn't occur on just one RPM, but on most of the dies that year. Maybe they had an over aggressive polisher that year?)











So even the slightest removal of the fields of the die will cause the coins to be struck with a raised area on the bay areas.

CoopHome : Die over polishing