The 1906-D Gold Half Eagle, also known as the Liberty Head design, is a U.S. $5 gold coin minted at the Denver Mint. The "D" mintmark signifies it was struck at Denver. The PCGS XF-40 grade indicates the coin is in Extra Fine condition, with noticeable wear on the high points but still retaining much of its original detail. In this grade, the coin will have some light to moderate surface wear but remains a good example of the coin's design. The Liberty Head design, created by Christian Gobrecht, was used on U.S. gold coins from the late 1800s to early 1900s, and the 1906-D is one of the more collectible versions due to its lower mintage. PCGS (Professional Coin Grading Service) is a reputable certification company, and an XF-40 grade assures collectors of the coin’s authenticity and quality.