1955-D Washington Quarter. MS-66 (PCGS). CAC. This appealing Gem exhibits dominant pearl gray patina that yields to crescents of more vivid reddish-rose and orange-gold along the left borders. With only 3,182,400 coins struck, the 1955-D has the lowest mintage of any circulation strike Washington quarter from 1941 through the end of the classic 90% silver series in 1964. Here is a superior quality survivor that will surely catch the eye of discerning collectors.