This is a 1985-P Jefferson Nickel that was struck on an Improperly Annealed Planchet. What happens is, the mint places it's planchets inside an oven before they are stuck. But, they use the same ovens for different types of coins. When they anneal cent planchets, some of the copper molecules come off and remain in the oven. Then, another type of planchet is placed in the oven and those particles settle on it and are cooked onto it. That results in a thin copper layer on the planchet. The coin is then struck. Many times, you see coins with this type of error but the coating is somewhat uneven...giving you "blotches" of copper color. In this case, the coin was almost completely covered giving it a nearly uniform copper appearance. This coin is slabbed and graded by NGC as MS63.