This particular cent got put aside because it was a 1969S. But, even if it weren't, I would have put it aside anyway. This particular coin just didn't have the right touch. Upon scrutinizing the obverse of this particular coin, nothing seemed to be out of place. But, upon verifying the reverse, lo and behold, the Memorial was performing a levitation act!
Naturally, magnifying it in the right light revealed the remnants of the two sides of the memorial that "hold the roof up". But, still, something was not quite right with the "feel" of this coin in hand. After giving this coin a bit more scrutiny, I do not believe that it was a filled die. When looking at the devices of the reverse, there seems to be a flatness to everything, as though the coin was struck weakly.
Now, the coin was obviously not a weak strike, as the obverse does not exhibit a weakness in any of the devices. Looking at the rim, however, you can see it raised up around the one o'clock to the four o'clock position, much like you would see with a die cap as it begins to form around the die. LostDutchman has pictured a VERY nice example of a die cap and how it forms into a "bottle cap" after prolonged strikes.
My theory is that this cent may have been a very nice die cap in the making, but fell off after one or two subsequent strikes as a cap. As the reverse came down upon the next planchet, being used as a "die" it struck the blank planchet with the Memorial side, causing the devices to flatten a bit, and the weaker portions of the devices to be smoothed out. The cent then quickly feel from the die, causing the appearance of a "floating roof" on the Memorial and a very slightly raised obverse rim.
What are your thoughts?

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