The coins are housed in a Brand New Dansco book and are composed of silver with a 40% fineness. The coins were struck in Philadelphia, Denver, and San Francisco, and are of various grades, including Proof, AU++ and BU+++. The coins are of the Type 1 and Type 2 varieties. The coins have been circulated and are in excellent condition. 21 Brilliant AU+++ coins and 11 BU+++ Proof coins every year of issue and every Mint mark, including the rarely-seen 1976 Bicentennial coins and all 10 special 40% silver coins.1973 Coins were only issues thur the US Mint. The set is a great addition to any coin collection.