The 2021-S Silver Proof set, to be offered by the U.S. Mint beginning at noon Eastern Time April 20, will be a seven-coin numismatic product and include the two quarter dollars designated for 2021.
Four of the seven coins in the set will be struck on planchets of .999 fine silver — the Roosevelt dime
, Kennedy half dollar
, the Tuskegee Airmen National Historic Site quarter dollar and the Washington Crossing the Delaware quarter dollar.
EDIT: It's possible that the new reverse on the Quarter of Gen. Washington crossing the Delaware might be limited to less than 1 year..
The Washington Crossing the Delaware coin is being issued under a provision of Public Law 110-456, which authorized the 56-coin America the Beautiful Quarters
Program, and included two provisions about successor coins. The theme for the replacement coin was designated in the legislation, and was intended as the "permanent" and static design for the denomination. However, legislation authorizing a new 56-coin program honoring women to begin in 2022 may result in the design being used for less than a year.