The 2023 US PROOF Set REPLACEMENT BOX is a product from the United States Mint, specifically minted in San Francisco. This set does not include any coins or a Certificate of Authenticity. It is designed as a replacement box for proof sets from the same year, providing customers with a flat box for storage and display. With a composition of none and a fineness of none, this product is ideal for collectors looking to replace missing pieces in their proof set collection.