Diagnostic Controls & Presets Early American Specie
Diagnostic Forensic Readings
Forensic Attribution Diagnostic
Real-time metallurgical and die variety cross-examination verified against certified populations.
Technical Breakdown: Physics, Metallurgy & Die Diagnostics
1792 Coinage Act Standard
The Act of April 2, 1792 established the standard for the US silver dollar at 416 grains (26.96 grams) of alloy containing 371.25 grains of pure silver:
1834 Diplomatic Mission Origin
Although bearing the date 1804, zero silver dollars were actually minted in 1804.
In 1834, the State Department requested special presentation proof sets of every denomination in circulation to present to the King of Siam and Sultan of Muscat. Because mint ledgers recorded dollars minted in 1804 (actually struck with 1803 dies), new dies were created with the 1804 date.
Class I, II, and III Diagnostics
The 15 known 1804 dollars are classified into three distinct production generations:
- Class I (Originals, 8 known): Perfect lettered edge "HUNDRED CENTS ONE DOLLAR OR UNIT".
- Class II (Unique, 1 known): Plain edge struck over an 1857 Swiss Shooting Thaler.
- Class III (Restrikes, 6 known): Lettered edge re-applied after striking, letter 'E' of STATES misaligned.
Documented Benchmark Auction Records
The finest known specimen of the 'King of American Coins'. Mirror fields with original lilac toning.
Original presentation coin gifted by Edmund Roberts to Sultan Said bin Sultan of Muscat in 1835.
Class III restrike with edge lettering applied over a previously plain-edge planchet.
Frequently Asked Questions
Why is the 1804 silver dollar called 'The King of American Coins'?
The 1804 silver dollar earned its title because for over a century it was the most sought-after and highest-priced American coin in existence. With only 15 genuine specimens known to exist across all three classes, acquiring an 1804 dollar has represented the pinnacle of numismatic achievement since the 1850s.
Were any 1804 dollars actually minted in the year 1804?
No. Although US Mint records state that 19,570 silver dollars were delivered in 1804, all of those coins were struck using leftover dies dated 1802 and 1803. The first true 1804-dated dollars were created in 1834 under President Andrew Jackson.
Why were the Class I 1804 dollars struck in 1834?
President Andrew Jackson authorized a special diplomatic mission led by envoy Edmund Roberts to negotiate trade treaties with Asian rulers. The State Department requested complete cased proof sets of US coins for the King of Siam (Thailand) and Sultan of Muscat (Oman). Because mint records listed dollars minted in 1804, engravers created new 1804 dies.
What is the unique Class II 1804 dollar?
The unique Class II 1804 dollar is housed in the National Numismatic Collection at the Smithsonian Institution. It was struck around 1858 directly over an 1857 Swiss Shooting Thaler (traces of the undertype are visible under magnification) and has a plain edge rather than a lettered edge.
What distinguishes Class I originals from Class III restrikes?
Class I dollars were struck on original lettered edge planchets where the letters 'STATES OF' are positioned with the claw of the eagle pointing between 'S' and 'O'. Class III restrikes were struck on plain planchets and had edge lettering applied afterwards, resulting in distinctive letter spacing anomalies and die rust pits.
What was the highest price ever paid for an 1804 dollar?
The Walter H. Childs specimen (graded PCGS PR-68) sold for $4.14 million in 1999 and subsequently traded for over $7.68 million in the D. Brent Pogue auction. In 2021, the Sultan of Muscat specimen tied this benchmark selling for $7.68 million at Heritage Auctions.
How can you easily spot a replica or counterfeit 1804 dollar?
Most common fakes are cast replicas made in China. They usually have incorrect weight (often 18g to 22g instead of 26.96g), cast bubbles on Liberty's neck, no edge lettering or modern reeded edges, and are cast in base metals like pot metal or brass coated with silver paint.