1959-D

The 1959-D quarter came off the Denver presses at 62,054,232 pieces, more than double the Philadelphia output of 25,533,291 and continuing the late-1950s pattern of Denver carrying the heavier quarter-production load. The composition stays at 90% silver and 10% copper, a 6.25-gram blank yielding .1808 ounces of actual silver weight, and the D mintmark sits on the reverse below the wreath in this era. That mintmark placement runs through 1964 before the 1965 to 1967 mintmark suspension and the eventual move to the obverse in 1968, so a 1959-D with the mintmark anywhere except the reverse is by definition not legitimate.

Strike quality on the 1959-D runs from average to good, with the typical late-1950s softness on the eagle's breast feathers and Washington's hair above the ear. The D mintmark punch is the standard authentication check; examine it under five-to-ten-power magnification for any underlying letter ghost, since added-mintmark counterfeits on Washington quarters of this period turn up occasionally and the 1950-D D/S over-mintmark from earlier in the decade established a known precedent for die-shop irregularities on Denver quarters. Bag-marks are the everyday grader's complaint on the issue, since Mint State examples survive primarily through original-roll preservation rather than purposeful collector-set inclusion. Population reports at PCGS, the Professional Coin Grading Service, show the date well-represented through MS65, with a clear drop at MS66 and genuine scarcity at MS67 where registry-set demand pushes prices into four-figure territory.

The 1959-D is a common date in the modern catalog, set-fillable in circulated grades at small premiums over silver melt and obtainable in MS65 without much patience. Toning enthusiasts seek out the relatively few examples that escaped the dipping cycle of the 1960s and 1970s, since original-skin Denver quarters of this vintage trade at strong premiums when the color is pleasing rather than spotty. Realistic acquisition is a certified MS65 or MS66 from a major auction, with the genuinely difficult upgrade target sitting at MS67 where examples thin sharply. For the broader story of John Flanagan's design, the 1965 silver-to-clad transition, and the series' production arc, see the Washington Quarter series history.