UNITED STATES. Mount Rushmore Golden Anniversary Commemorative. Gold five dollar. 21 mm. .900 fine (.242 AGW). 1991. Eagle flying over Mt. Rushmore / "Mount Rushmore National Memorial" in script. PCGS MS 70. Custom slab with John M. Mercanti signature (12th Chief Engraver of the US Mint). Light scratches in photo are in slab plastic, not coin.