This 1980 P Quarter with Filled Mint Mark Error has multiple errors that make it a unique addition to any collection. The coin is circulated and made of 75% copper and 25% nickel over a pure copper center, with a fineness of 0.75. It was struck in a business style and has not been graded or certified. The coin features multiple errors that make it stand out from other quarters. It was minted in the United States and is a great addition to any coin collection. Whether you're a seasoned collector or just starting out, this coin is sure to impress.