1868 Liberty Seated Quarter. Proof-63 (PCGS). CAC.,Rich steel gray and antique copper peripheral toning gives way to circular areas of brilliance in the centers of this Choice Proof 1868 quarter. The iridescent quality of the toning allows ready appreciation of a highly reflective finish. Handsome Choice quality from a mintage of 600 Proofs.,From the A.J. Vanderbilt Collection.,