Watch List notes:

(g) USA, 1880 S $5 'Liberty Head' (gold Half-Eagle), San Francisco, by Christian Gobrecht (F.143; KM 101; NGC ID 25XC; PCGS ID 8352), much striking brilliance in recesses, attractive thus, near extremely fine.
From the Wilhelm Wildegger (1888-1981) Collection
Estimate: £220 - £260