1968-2018 50 Years Proof Set Run - 408 Coins, 51 Complete Sets. 1968-2018 50 Years Proof Set Run - 408 Coins, 51 Complete Sets. The 2009 mint and proof sets had the highest number of coins and highest face value of any standard mint and proof sets issued, as they included 5 varieties of dollar coin, 6 varieties of quarter, and 4 varieties of lincoln cents. This set encompasses the entire 50 state quarter series. This will also include the two years of bicentennial coinage (1975 and 1976) and the last year of 95% copper circulating Lincoln cents (1981).