The 2026 American Innovation $1 Reverse Proof Set contains four proof-finish $1 coins struck at the San Francisco Mint (S mint mark). It honors innovations from Iowa (Dr. Norman Borlaug and the Green Revolution), Wisconsin (the Cray-1 supercomputer), California (Steve Jobs) and Minnesota (mobile refrigeration). Each coin has a reverse proof finish, with frosted fields and mirrored devices. The obverse is the Statue of Liberty design, and the 2026 privy mark features a Liberty Bell with "250" for the nation's semiquincentennial. The set comes sealed in a clear plastic lens within a designed package.