1906-D

Few branch-mint debuts carry the historical weight of this issue. When the Denver Mint struck its first coins on February 1, 1906, the facility had been authorized two years earlier to capture the gold flowing out of Colorado's Cripple Creek and Leadville districts. Double eagle production began on April 4, 1906, and the resulting 620,000-piece run made this issue the inaugural Denver Mint Liberty Head $20 and the very first gold coin of any denomination produced at the new branch. Together with the 1907-D that followed, it forms a closed two-coin set; the Coronet Head series ended later in 1907 when Augustus Saint-Gaudens's redesign took over the denomination.

Within the broader 1906 trio, the issue occupies a middle position by mintage but a leading one by attention: Philadelphia struck only 69,690 pieces, San Francisco produced 2,065,750, and Denver fell between at 620,000. Survival, however, runs leaner than the figure suggests. Industry estimates place certified populations across PCGS and NGC at roughly 1,900 examples in all grades, a fraction of common Philadelphia dates such as the 1904, which has been graded well into the six figures. Strike quality on confirmed coins tends to be sharp for the series, with crisp star centers and well-defined hair detail reflecting fresh dies pressed into service at the brand-new facility.

Most surviving examples cluster between AU and MS-62, where Heritage Auctions has documented PCGS populations near 864 coins at the MS-62 level. Choice uncirculated MS-63 pieces become noticeably tougher, and gem MS-65 coins are genuinely scarce, with finest-known examples at MS-66 representing the practical ceiling for the date. Collectors pursuing a Denver Mint type set or a complete two-coin Liberty subset from the facility treat the issue as the cornerstone, and its first-year status sustains a premium beyond what mintage alone would predict. For background on James B. Longacre's design and the long arc that closed at Denver, see our Liberty Head Double Eagle series history.