George Morgan's famous liberty head design, previously believed to have been modeled after Anna Williams, and struck in gold. This was also made as an eagle J1581-J1582/P1774-P1775.
2 examples were struck in gold J1577/P1770. Roger Burdette noted the following from a January 12, 1878 Mint archive: "Two eagles and two half eagles, Morganís design, in gold. For directorís office."
Pedigrees for the 2 known half eagles are below:
1) Massamore 11/1884 lot 506, Barclay-Steigerwalt 4/1885 lot 988, Ely-Scott Stamp & Coin 11/1888 lot 115, C.F. Libbie 10/1901 lot 826, Mitchelson, Connecticut State Library.
2) Parmelee, V. Brand (journal id #12718) to Horace Brand, Judd, Wilkison, Smithsonian - illustrated above.
Additional information on these can be found in the article "The 1884 Connection: A History of the 1878 U.S. Gold Patterns" in the November 1981 issue of The Numismatist.
This design was also struck in copper, J1578/P1771, with about a dozen known, several of which have been gilted.
Photo courtesy of the National Numismatic Collection of the Smithsonian Institution.