Coin Specifications Denomination: $1 (U.S. legal tender)​ Mint Mark: P (Philadelphia Mint)​ Composition: 90% silver, 10% copper​ Weight: 26.73 grams (0.859 troy oz)​ Silver Content: 0.7734 troy oz​ Diameter: 38.1 mm​ Edge: Reeded​ Finish: Proof Designers: Obverse by Chris Costello; Reverse by Patricia Lucas-Morris​ Design Details Obverse: Features a portrait of Mark Twain holding a pipe, with smoke forming a silhouette of Huck Finn and Jim on a raft in the background, referencing “Adventures of Huckleberry Finn.”​ Reverse: Depicts an assortment of characters leaping to life from Twain’s works, including a knight, a frog, and a steamboat, symbolizing his diverse literary creations.​