The product is a collection of 41 United States Mint proof sets from 1967 to 2006, all minted in San Francisco. Some sets include silver coins struck with a proof finish, making them highly collectible. These sets are uncertified but come directly from the U. Mint, guaranteeing their authenticity and quality. This product allows collectors to own a piece of American numismatic history from each year in the specified period. All in original packaging, most with certificates of authenticity. Also have available any particular year you maybe interested in ask and I’ll let you know!