Monaco 20 Francs Prince Rainier III
Country of Origin: Monaco
Year of Issue: 1950
Denomination: 20 Francs
Composition: Aluminum-Bronze
Brief Description
A golden-hued coin featuring the left-facing profile of Prince Rainier III on the obverse and the Grimaldi coat of arms on the reverse.
Historical Significance
This coin was minted during the early reign of Prince Rainier III, who ascended the throne in 1949. It represents the post-WWII monetary system of the Principality, which was closely linked to the French Franc.
Estimated Value
$1.00-$3.00 in circulated condition, $10.00-$25.00 in Mint State (UNC)
Care Instructions
Aluminum-bronze is prone to spotting and oxidation. Store in a cool, dry place within non-PVC flips. Avoid cleaning as it will remove the original luster and decrease value.
Mint Mark
Cornucopia (Paris Mint) and Wing (Chief Engraver Lucien Bazor) marks
Mintage & Rarity
1,000,000; relatively common but harder to find in high grades.
Weight & Diameter
4.00g and 23.5mm
Edge
Plain
Apparent Grade
Extremely Fine (XF). Most details are sharp, but there is noticeable surface wear and 'bag marks' on the prince's cheek and the fields.
Obverse (Front)
Head of Prince Rainier III facing left. Legend: 'RAINIER III PRINCE DE MONACO' with the date '1950' at the bottom. Designer signature 'G.P. PIERRE' is visible.
Reverse (Back)
The crowned coat of arms of the Grimaldi family flanked by '20' and 'FRS'. Legend at the bottom: 'DEO JUVANTE' (With God's Help).
What Drives This Coin's Value
The primary value factor is the preservation of original luster. Because aluminum-bronze is a soft alloy, coins without heavy scratches or 'fingernail' marks command a premium.
Similar Coins
Similar to the French 20 Francs (G. Guiraud type) of the same era, which shares similar metal composition and size but different imagery.
Authenticity & Counterfeit Red Flags
Counterfeits of this specific date are rare due to its low value, but check for soft details or mushy lettering which may indicate a cast fake.
Notable Varieties & Errors
No major die varieties are widely recognized for this year, though some exist with slightly different placement of the mint marks.
Created At: 2026-05-22T07:21:34.471184