Diagnostic Controls & Presets The King of American Coins • $7.68 Million Record
Diagnostic Forensic Readings
Forensic Attribution Diagnostic
Real-time metallurgical and die variety cross-examination verified against certified populations.
Technical Breakdown: Physics, Metallurgy & Die Diagnostics
The 1834 Diplomatic Presentation Mystery
Although dated 1804, no silver dollars dated 1804 were struck in that year. In 1834, the U.S. State Department ordered complete proof coin presentation sets for foreign dignitaries (including the King of Siam and Sultan of Muscat):
Mint records showed dollars were produced in 1804 (though struck from leftover 1802 and 1803 dies). Unaware of this, Chief Engraver William Kneass created new dies dated 1804, creating the most famous rarity in American numismatics.
Class I vs Class III Diagnostic Markers
Class I specimens display immaculate proof mirrors with no rust pits on the dies. Class III restrikes (struck covertly around 1859 for collector sale) reveal distinctive die markers:
Class II was struck without edge lettering over an 1857 Swiss Shooting Thaler; the single known specimen resides permanently in the National Numismatic Collection at the Smithsonian.
Documented Benchmark Auction Records
Stack's Bowers Galleries & Sotheby's Pogue Collection Sale. The Sultan of Muscat specimen, hailed as the finest known example of the 'King of American Coins'.
Heritage Auctions Platinum Night. The famous Dexter specimen featuring small 'D' counterstamp in the reverse cloud.
Stack's Bowers Rarities Auction. The Idler specimen, struck c. 1859 with lettered edge.
Frequently Asked Questions
Why is the 1804 Silver Dollar called the 'King of American Coins'?
It is the most famous, romanticized, and intensely pursued rarity in U.S. numismatics. Only 15 authentic specimens are known to exist across all three classes, with top examples selling for over $7 million.
Was the 1804 Dollar actually struck in 1804?
No. The U.S. Mint struck silver dollars in 1804, but they used leftover dies dated 1802 and 1803. The coins bearing the date '1804' were first struck in 1834 under President Andrew Jackson for diplomatic gift sets sent to Asian dignitaries.
What is the difference between Class I, Class II, and Class III?
Class I coins (8 known) are the original 1834 presentation strikes with lettered edges. Class II (1 known, in the Smithsonian) was a restrike made around 1858 over a Swiss coin with a plain edge. Class III coins (6 known) were struck around 1859 with lettered edges.
I found an 1804 silver dollar in an old box. Could it be real?
Virtually every 1804 silver dollar found outside major museum archives or multi-million-dollar auction catalogs is a modern counterfeit replica or cast souvenir. Every genuine specimen has a documented provenance dating back over a century.
How can you authenticate an 1804 dollar?
Authentic coins have exact metallurgical composition (89.2% silver, 10.8% copper), weigh 26.96 grams, exhibit pristine mirror proof fields or authentic wear patterns, and have lettering applied using the historical Castaing machine.
Where is the Sultan of Muscat 1804 dollar today?
The Sultan of Muscat specimen was sold in the famous D. Brent Pogue auction series for $7,680,000 to an anonymous private collector.
Can any third-party grading service authenticate an 1804 dollar?
Yes, both PCGS and NGC have certified authentic 1804 silver dollars and maintain comprehensive photographic archives of all 15 known specimens.