1966 Special Mint Set Brilliant Uncirculated Each set contained five coins: Lincoln Cent, Jefferson Nickel, Roosevelt Dime, Washington Quarter, and Kennedy Half Dollar.Original packaging: The coins in Special Mint Sets were housed in a clear plastic holder made of two pieces that snapped together. Each coin was held in place by a raised ring of plastic. A thin sheet of blue plastic, with cutouts for each coin, provided a background. Each holder was placed into a cardboard slipcase.