I thought this Jefferson 1988-P was a proof given the very thick edges, and the deep relief reminds me of earlier coins from the 60s, rather than more recent coins. Yet, it is slightly shorter than another 1988-p nickel that I use for comparison. My assumption is that it has been rolled post-mint which has caused the thicker appearance. Am I on track here? There is also some flattening on the obverse on the center devices, but it doesn't have the " Dryer Coin" or "hammered rims" appearance I have seen with other coins.
It is perfectly round. and yes, the obverse looks sanded or flattened somehow (but not the reverse). Here are some more photos, including details on the rim:
It may have been hammered, or hit with a spoon and made the rim roll up a bit. (I lean towards the hammer theory. Note how the devices on LIBERTY squashed inwards. Looks like it is PSD. It wasn't struck that way.
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