No mint mark means it was struck at the Philadelphia Mint. The coin has mint errors and anomalies. This is a great "character" coin for any error collector's set. Obverse Rim Cud/Die Break; a prominent raised area of metal is visible in front of the Native American's chin, and a die break on the rim. There is two distinct, raised "lumps" of metal located on the upper lip "Die Chips" Reverse Leg Anomalies; The rear leg of the buffalo shows shelf-like doubling (likely Machine Doubling or Die Deteriorations) adding to the coin's unique look. $15