Spanish 100 Pesetas Coin, Juan Carlos I and Sofia, 1989
Coin/Bullion · Royal Mint of Spain (Real Casa de la Moneda), Madrid. The mint is a state-owned institution with a history dating back to the 16th century.
Pattern: Standard Circulation 100 Pesetas Coinage, Juan Carlos I era (1975-2001).

Type
Coin/Bullion
Maker
Royal Mint of Spain (Real Casa de la Moneda), Madrid. The mint is a state-owned institution with a history dating back to the 16th century.
Material
Aluminium-Bronze (92% Copper, 6% Aluminium, 2% Nickel). Note: This is an alloy, not silver. The yellowish-champagne color is characteristic of this metal composition.
Dimensions
Diameter: 24.5 mm; Thickness: 2.9 mm; Weight: 9.3 grams. This is a standard size for late 20th-century Spanish 100-peseta coins.
Description
This 100 Pesetas coin is a quintessential piece of Spanish numismatic history from the late 1980s. Featuring the regal conjoined profiles of the King and Queen consort, it represents the stability of the Spanish monarchy during the country's economic integration into Europe. The aluminium-bronze alloy gives it a distinct 'golden' luster that differentiates it from smaller denominations of the time.
Key Features
Conjoined royal portraits; 'Bicentenario' series aesthetic transition; Aluminium-bronze color; 'M' mintmark (Madrid).
Material & Composition
Aluminium-Bronze (92% Copper, 6% Aluminium, 2% Nickel). Note: This is an alloy, not silver. The yellowish-champagne color is characteristic of this metal composition.
Finish & Decoration
Struck with a matte relief on a semi-satin field. Features the conjoined busts of King Juan Carlos I and Queen Sofia facing left. The reverse (not shown) typically depicts the Spanish Royal Coat of Arms.
Hallmarks & Stamps
The obverse features the inscription 'JUAN CARLOS I Y SOFIA' and the date '1989'. On the reverse, a crowned 'M' mintmark indicates the Madrid Mint.
Construction Details
Industrial die-struck coinage; mass-produced using high-pressure hydraulic presses on pre-cut alloy planchets.
Functional Features
Milled edge (lettered/grooved) for counterfeit prevention and tactile identification. Legal tender in Spain until the introduction of the Euro in 2002.
Handle & Grip Details
None (Circular coin edge intended for handheld use).
Craftsmanship Details
Precision machine-struck detail. High-volume industrial production resulting in sharp, consistent edges and uniform weight across millions of units.
Authentication Indicators
Correct lettering font for the 1989 strike; appropriate thickness-to-weight ratio; characteristic color of aged aluminium-bronze; standard circulation wear patterns.
Origin & Manufacturing
Madrid, Spain; Royal Mint of Spain. Traditional European state minting standards.
Era & Period
Modern Spain (Constitutional Monarchy); Contemporary Era. Reflects the post-Franco democratic period under King Juan Carlos I.
Age Estimate
Dated 1989; 35 years old. This was the final decade of the Peseta's use.
Cultural Significance
Represents the economic transition of Spain prior to joining the Eurozone. It reflects national identity and the cultural prominence of the Borbón monarchy in повседневный life (daily life).
Condition Notes
Fair to Good. Visible surface scratches (circulation wear), contact marks (bag marks), and slight loss of detail in the hair. Metal shows signs of oxidation and handling oils but holds its structural integrity. No major dents or deformities.
Value Estimate
$1.00 - $3.00 USD. Value is primarily numismatic/sentimental as it is no longer legal tender and contains no precious metal.
Care & Maintenance
For circulation-grade coins, do not over-clean. To remove grime, use warm soapy water and a soft cloth; avoid harsh abrasives or silver dips which can damage the bronze patina. Store in acid-free coin flips.
Similar Pieces
1989 200 Pesetas (Silver/Cupronickel), 1989 500 Pesetas (features similar portraits but larger and different metal). Same denomination from 1982-1988 used a single portrait of the King.
Interesting Facts
The 100 Peseta coin was nicknamed '20 duros' in Spain, as one 'duro' equaled 5 pesetas. Juan Carlos I eventually abdicated in 2014, making these coins nostalgic reminders of his long reign.