1960-1969 S 90% Silver Washington Quarters Gem Proof & SMS Run 10 Coins US Mint Decade Lot Complete 1960's Set Great run of Washington Quarters. The 1960, 1961, 1962, 1963 and 1964 quarters are all 90% silver. The 1965, 1966 and 1967 coins are clad and come from Special Mint Sets because no proof coins were produced in these years. The 1968 and 1969 coins carry the S mint mark and are also clad. The group is on hand and ships immediately. 1960-1969 Washington Quarters 10 Coin Run Gem Proof & SMS Similar to Coins Shown