1968-2008 40 Years Proof Set Run - 273 Coins, 41 Complete Sets. 1968-2008 40 Years Proof Set Run - 273 Coins, 41 Complete Sets. This set includes all 50 State Quarter varieties. For 1982 only, there was a Department of the Treasury token included, the only appearance a token made in proof sets. This will also include the two years of bicentennial coinage (1975 and 1976) and the last year of 95% copper circulating Lincoln cents (1981).