Just 6,600 examples of the1855-S Indian Head $3 were made, with a precious few still known today.
The coins were struck in San Francisco to serve growing commerce during the famed California Gold Rush.
The distinctive Indian Head portrayal was the work of artist George Teener Hubbard featuring a princess headband motif.
Estimates suggest only around 100 authenticated survivors remain of the rare 1855-S $3 issue.
Any example grading AU or Mint State carries exceptional value and would be prized by collectors.
Even in lower grades, the 1855-S Indian Head $3 sells for over $100,000 when offered at major auction houses.
Tiny surviving populations make the 1855-S a legendary key date three dollar gold coin.