1904 Liberty Head Half Eagle. JD-1, the only known dies. Rarity-4. Proof-55 (PCGS). CAC. Brightly mirrored fields and razor sharp design elements are still very much in evidence on both sides of this lightly handled specimen. One of 136 Proof half eagles of the date produced, though specialist John W. Dannreuther (2018) estimates that just 80 to 100 coins are extant in all grades.