Key Details: Mint: Philadelphia Mint (P) Year: 1999 Denomination: $1 (Silver Dollar) Weight: 26.73 grams Composition: 90% silver, 10% copper Diameter: 38.1 mm Grade: PCGS PR69DCAM – A near-perfect proof coin with deep cameo contrast. Mintage: 82,563 (Proof version) Design Highlights: Obverse (Front): Features a buffalo (bison) in front of the park’s famous geothermal feature, the Old Faithful geyser, designed by William C. Cousins. Reverse (Back): Depicts an adaptation of the United States Department of the Interior Seal, showing a buffalo and sun, designed by John Mercanti.