The 1975 U.S. Mint 6-Coin Proof Set features all six denominations of U.S. coinage produced for collectors in 1975, each expertly struck at the San Francisco Mint with brilliant mirror-like surfaces and razor-sharp details. The set includes the Lincoln Memorial Cent, Jefferson Nickel, Roosevelt Dime, Washington Quarter, Kennedy Half Dollar, and Eisenhower Dollar, all bearing the "S" mintmark. Each coin was struck multiple times using specially polished dies and carefully prepared planchets, producing exceptional reflective fields and crisp design elements, with many examples displaying beautiful cameo or deep cameo contrast. Although the U.S. Mint sold the standard five-coin Proof Set separately from the Eisenhower Proof Dollar, collector-assembled six-coin sets provide a complete representation of every denomination issued during the year. The 1975-S Eisenhower Dollar was available in both 40% silver and copper-nickel clad versions, so the composition should be identified accordingly. With an official five-coin Proof Set mintage of 2,845,450, the 1975 issue is especially noteworthy because it was the final year of the regular Eisenhower Dollar, preceding its replacement by the Susan B. Anthony Dollar in 1979. Complete six-coin sets remain highly desirable for their exceptional quality, historical significance, and representation of the last years of the large-size U.S. dollar coin.