I am almost certain that the O.P's 1982-P Lincoln Cent is a Copper plated Zinc Cent. The coin has the appearance that it was Double Struck on the Reverse. However, the second strike has the appearance of having been struck by a completely different Die and possibly from a Foreign Coin Die. Therefore, it is my opinion that the coin is likely man-made and not done at the Philadelphia Mint. Of course, I could be wrong and better close-up pics might help in the determination of what actually happened to the coin.