1964 Washington Quarter. MS-66 (PCGS). CAC. Intense toning in deep pinkish-rose, crimson-copper, lilac, golden-apricot and midnight blue envelops both sides of this phenomenal Gem. It is definitely one for the toning enthusiast. Production of quarters skyrocketed at both the Philadelphia and Denver mints in 1964, the former facility delivering over 500 million circulation strikes that year. Very few from that large mintage are as superb as this, however, either from technical or aesthetic standpoints.