1872 Liberty Seated Silver Dollar. Proof-64 (NGC). Delicate gold and silver iridescence appears to drift toward the borders on both sides of this boldly struck, modestly cameoed specimen. The 1872 is one of the more frequently encountered Proofs in the Liberty Seated dollar series, the mintage a relatively hefty 950 pieces. Even so, survivors are scarcer than the number struck might indicate, many examples likely remaining unsold and melted in the Mint after the Act of February 12, 1873, abolished the standard silver dollar.