Each volume covers 100 years of American history with 100 solid bronze proof medals which depict a key event, invention or figure from the specific year commemorated on the obverse and a brief history of that year on the reverse. This special 2 volume leather-bound set is in mint condition. The medals are in their original capsules with 20 each set into the 5 leafs of each volume. There are varying degrees of natural toning occurring throughout. It comes with the original Care and Handling instructon sheet issued by the mint in 1973. This is a very handsome set!