France Napoleon III 1866-BB 50 Francs Gold Coin
Coin (Numismatic and Bullion) · Yellow Gold with a faint reddish/orange hue due to the 10% copper alloy used to strengthen the coin for circulation.
Purity: 21.6K (0.900 Fineness). This purity constitutes 90% pure gold and 10% copper alloy for durability, typical of the Latin Monetary Union standards.
Type
Coin (Numismatic and Bullion)
Purity
21.6K (0.900 Fineness). This purity constitutes 90% pure gold and 10% copper alloy for durability, typical of the Latin Monetary Union standards.
Gold Type
Yellow Gold with a faint reddish/orange hue due to the 10% copper alloy used to strengthen the coin for circulation.
Weight
16.13 grams gross weight (Approximately 0.4667 troy ounces of pure gold content).
Description
An exquisite example of Second Empire numismatics, this 50 Francs gold coin features the Laureate head of Napoleon III on the obverse (not shown) and the Imperial Coat of Arms on the reverse. The reverse depicts a crowned eagle on a shield, surrounded by the imperial mantle, making it a centerpiece for collectors of European royalty or gold bullion investors.
Key Features
BB Mint Mark (Strasbourg), 1866 date, Imperial Eagle motif, and the distinctive 90% gold tint of French mintage.
Color & Finish
Deep, warm yellow gold with a natural aged patina. The finish was originally specimen-like mint luster, now showing signs of historical circulation and surface oxidation typical of mid-19th-century coinage.
Hallmarks & Stamps
Letters 'EMPIRE FRANCAIS'; Denomination '50 FR'; Date '1866'; Mint Mark 'BB' (Strasbourg Mint); Privy marks: Bee (Director) and Anchor (Engraver General).
Dimensions Estimate
28 mm diameter, approximately 1.9 mm thickness.
Gemstones & Inlays
None. The item is a struck metal coin with decorative relief engraving featuring the Imperial Coat of Arms of Napoleon III.
Clasp & Closure
Not applicable. The coin features a reeded (milled) edge to prevent gold shaving, a common security measure for 19th-century currency.
Chain & Links
Not applicable; however, the coin edge is reeded with vertical grooves to verify the physical integrity of the gold.
Craftsmanship Details
Struck using heavy steam-powered coin presses. The relief is exceptionally sharp in the heraldry, showcasing the high technical standards of 19th-century French die-engraving.
Authentication Indicators
The lettering font is consistent with French minting of the era; the 'BB' and privy marks are correctly placed; the reeded edge appears authentic. Weight should be verified as 16.13g (+/- 0.05g) for final authentication.
Origin & Maker
France; struck at the Strasbourg Mint (indicated by the 'BB' mint mark). The chief engraver was Albert-Désiré Barre.
Era & Period
Second French Empire (1852–1870). The design reflects the neoclassical and imperial style popularized during the reign of Napoleon III.
Age Estimate
Dated 1866; approximately 158 years old.
Cultural Significance
Represents the economic height of the Second French Empire and the standardization of gold currency under the Latin Monetary Union, which aimed to create a single currency system across Europe.
Condition Notes
Very Good to Fine (VG-F). Visible surface wear on high points (crown and eagle wings), minor dings on the rim, and darkening/patina in the recessed areas. No major scratches or cleaning marks visible.
Value Estimate
Market value is heavily tied to the spot price of gold (~$1,100 - $1,200 melt value) plus a numismatic premium of 10-25% depending on final grade.
Care & Maintenance
Do not polish or clean. Store in a PVC-free plastic capsule or archival flip. Handle only by the edges using cotton gloves to avoid transferring skin oils that can cause spotting.
Similar Items
1866 French 100 Francs (larger, 32.26g), 1866 French 20 Francs (smaller, 6.45g), or the 1866 British Gold Sovereign.
Interesting Facts
The 50 Francs was a high-value coin in 1866, often used for international trade rather than daily local commerce, which is why many survive in better condition than smaller denominations.