The product is a 1971-S Cam Proofs Roosevelt Dime that has a Double Die Obverse (DDO) and a Double Die Reverse (DDR), with varying degrees of rotation (RPM). This error coin is composed of copper with a fineness of 0.9 and is uncirculated. Minted in San Francisco, this coin features a variety of the Mercury design, making it a unique and collectible piece for numismatists interested in US coins and errors.