1906-O

The 1906-O closes the book on a story that began in 1841: it is the final $10 eagle ever struck at the New Orleans Mint, the terminal coin of a sixty-five-year run that spanned the Liberty Seated era, the Civil War shutdown, the post-Reconstruction restart of 1879, and the long With Motto twilight. The 86,895-piece mintage was modest by 1906 standards but pointed, within months the New Orleans facility would cease eagle production entirely and never resume, with the mint itself winding down through 1909 before closing as a coining facility. Strike quality runs above the late-era O-mint average, with sharp central detail on Liberty's hair and well-defined eagle plumage; surfaces tend toward a soft, satiny luster, and many examples carry a pleasing rose-gold hue characteristic of New Orleans alloy.

Authentication is critical. The mass standard is 16.718 grams with a specific gravity near 17.2 for the 90% gold, 10% copper alloy, readings outside roughly half a percent on either metric warrant immediate skepticism. The O mintmark sits below the eagle's tail feathers and on genuine examples is small, crisply punched, and shows clean internal contours; added-mintmark fakes built from common-date 1906 Philadelphia coins typically reveal disturbed surface metal around the punch or a mintmark that floats too high or too low relative to the feathers. Doug Winter ranks the 1906-O as the scarcest New Orleans eagle struck after 1900, noting it is almost never encountered below AU55, the typical survivor falls in the AU55-MS62 band, MS63 is genuinely scarce, properly graded MS64 is rare, and gems can be counted on one hand. PCGS reports roughly 452 graded and NGC roughly 505, a combined population under 1,000.

For the date-and-mintmark collector this is a Semi-Key with real teeth: choice About Uncirculated examples trade in the low four figures at major-house venues, MS62 coins have realized solid mid-four-figure prices through Heritage and Stack's Bowers, and MS64-or-finer pieces command five figures when they surface. The combination of historical finality, above-average eye appeal for a late-era branch issue, and a tightly bounded survivor population gives the 1906-O a collecting profile distinct from any other New Orleans eagle, at once a type coin, a mintmark coin, and a closing chapter. For broader context on the design's evolution, see the Liberty Head Eagle series history.