It includes proof versions of various US coins, notably the five American Women Quarters Program coins honoring figures like Maya Angelou and Dr. Sally Ride, along with a Kennedy half dollar and a Roosevelt dime. Material: The quarters, dime, and half dollar in this set are struck in 99.9% fine silver. Quality: These coins are struck in proof quality at the San Francisco Mint, featuring mirror-like backgrounds and frosted, sculpted foregrounds, creating a special cameo effect. Limited Edition: The 2022 Limited Edition Silver Proof Set had a production limit of 50,000 sets.