The coin in question is a 1917 Buffalo Nickel, specifically minted in San Francisco, indicated by the 'S' mint mark. This coin, part of the Buffalo Nickel series, is valued at five cents (5¢), commonly referred to as a nickel. Struck from a copper-nickel composition, it has a diameter of 21.2 millimeters and a weight of 5 grams. The 1917 Buffalo Nickel, while not the most scarce in its mintage with a production run of 4,193,000 pieces, retains historical significance and charm due to its iconic design featuring a Native American on the obverse and a bison on the reverse. The coin exemplifies classic American numismatic art and is a notable collectible among enthusiasts. Given its characteristics, the 1917-S Buffalo Nickel is classified under the sub-type of coins. Its current market value varies based on condition and demand among collectors, but it is generally regarded as a staple in many coin collections, particularly those focused on classic American coins.