The Liberty Head Double Eagles are a series of gold coins minted in the United States, featuring a design by engraver James B. Longacre. Struck from 1849 to 1909, these coins are valued at $20 and were made from 90% gold and 10% copper. The 1868 Liberty Head Double Eagle showcases the iconic Liberty head on the obverse and a detailed eagle on the reverse, making it a sought-after collectible among numismatists. Its historical significance and gold content contribute to its appeal in the marketplace.