1840-O Liberty Head Half Eagle. Narrow Mill. AU-50 Details--Repaired, Mounts Removed, Whizzed (ANACS).Bright golden-orange surfaces retain bold to sharp striking detail throughout the design. A curious chrome-like texture helps to confirm this coin as a former jewelry piece, although evidence for the mount removal is not readily evident through the ANACS holder. Although the Narrow Mill is the more available variety of this first year New Orleans Mint half eagle, the 1840-O is still scarce and is particularly elusive in grades above EF.