Because your coin features the "S" mint mark from the San Francisco Mint and was struck as a Proof in 1972, it is confirmed to have silver content.Metal Composition BreakdownThe official United States Mint specifications for this specific coin run include:Outer Layers: 80% Silver and 20% Copper.Inner Core: 21% Silver and 79% Copper.Net Weight: 40% pure silver across the entire coin. Obverse (Front) DescriptionCentral Portrait: A bare-headed, left-facing profile bust of former U.S. President and General Dwight D. Eisenhower.Inscriptions:The word "LIBERTY" arcs gracefully along the top rim above his head.The national motto "IN GOD WE TRUST" is stamped in a two-line layout directly below his chin.The minting year "1972" is centered at the flat bottom rim.Mint Mark: The letter "S" sits directly above the "9" and "7" digits of the date, identifying it as a San Francisco product.Designer Signature: The small initials "FG" are embossed on the lower truncation of Eisenhower's neck.Reverse (Back) DescriptionThe reverse motif serves as a tribute to humanity's triumph during the 1969 Apollo 11 moon landing. The composition was adapted directly from the official mission patch created by astronaut Michael Collins.Central Imagery: A symbolic American bald eagle is depicted mid-descent, extending its wings as it lands on the crater-pocked surface of the moon.Symbol of Peace: The eagle securely clutches a small olive branch in both of its talons.The Planet: A distant, detailed image of the planet Earth hangs in the background sky above and to the left of the eagle's head.Inscriptions:"UNITED STATES OF AMERICA" arcs along the top edge.The legal face value "ONE DOLLAR" wraps along the lower curve.The motto "E PLURIBUS UNUM" is centered directly over the eagle's wings.Stars: A ring of 13 stars encircles the inner field, symbolizing the original thirteen American colonies.