It doesn't look mirrored in these images. This may have been struck with a new or freshly polished set of dies, but it's just a normal business strike. If it was a proof, you would see deep water-like mirrors that reflect an image back towards you.
Cents struck in Philidelphia don't have mint marks, with the exception of the 2017-P cent. They added a P mint mark that year to celebrate the 225th anniversary of the opening of the mint. It was the first and only time a P mint mark has appeared on the US one cent coin.
ANA ID: 3203813 - CONECA ID: N-5637 Clean a coin that may be worth collecting? Please DON'T! When in doubt, leave it dirty!!











































