This listing offers 20 beautiful US Mint proof sets, all sealed in cases, some of which are unopened. The sets include uncirculated coins struck in San Francisco and are of ungraded quality. The US Mint has certified them and they were manufactured in the United States. These proof sets are a great addition to any coin collection and are perfect for those who appreciate the artistry and history behind US coins. Don't miss out on this opportunity to own a piece of history!  PLEASE SEE PHOTOS  AND  CONDITION DESCRIPTION