Thailand 1 Baht Coin, Rama IX Portrait
Coin/Bullion · Royal Thai Mint (Pathum Thani, Thailand). The mint operates under the Treasury Department and is renowned for precision in producing the currency of the Kingdom of Thailand.
Pattern: Rama IX Regular Circulation Issue (King Bhumibol Adulyadej)

Type
Coin/Bullion
Maker
Royal Thai Mint (Pathum Thani, Thailand). The mint operates under the Treasury Department and is renowned for precision in producing the currency of the Kingdom of Thailand.
Material
Copper-nickel (specifically 75% Copper, 25% Nickel). Note: This is an base-metal alloy and contains no actual silver despite its silver-colored appearance.
Dimensions
Diameter: 20 mm; Thickness: 1.48 mm; Weight: 3.4 grams. This is the standard small-format 1 Baht size.
Description
A standard circulating 1 Baht coin from Thailand, featuring the iconic portrait of King Bhumibol Adulyadej. Often mistaken for silver by tourists due to its bright nickel luster, it is the workhorse of the Thai economy. The design is minimalist and regal, typical of the Rama IX coinage series.
Key Features
Portrait of Rama IX looking left with eye glasses; Thai script along the perimeter; silver-colored copper-nickel composition.
Material & Composition
Copper-nickel (specifically 75% Copper, 25% Nickel). Note: This is an base-metal alloy and contains no actual silver despite its silver-colored appearance.
Finish & Decoration
Uncirculated to lightly circulated luster; features a left-facing profile portrait of King Bhumibol Adulyadej (Rama IX) in royal uniform. Reverse typically features a Thai temple (Likely Wat Phra Kaew).
Hallmarks & Stamps
Thai script indicating the monarch's name (Bhumibol Adulyadej) and title (Rama IX). Denomination is marked as '1 Baht' in Thai numerals.
Construction Details
Machine-struck/die-struck in a high-pressure minting press with a reeded (milled) edge to prevent clipping and counterfeiting.
Functional Features
Serrations on the edge (reeding) for tactile identification and security; raised rim to protect the design from surface wear.
Handle & Grip Details
None; handheld currency.
Craftsmanship Details
High-quality industrial minting; sharp detail in the hair and uniform of the King, indicative of well-maintained steel dies.
Authentication Indicators
Distinctive Thai script and portraiture; correct 20mm diameter and reeded edge finish consistent with Royal Thai Mint standards.
Origin & Manufacturing
Thailand; struck at the Royal Thai Mint. This specific design was the primary unit of currency during the late 20th century.
Era & Period
Modern Thailand (Late 20th - Early 21st Century); Rama IX era, reflecting the long-standing Thai monarchic tradition.
Age Estimate
Circa 1986–2008 based on the portrait style and coin size. The small copper-nickel 1 Baht was introduced in 1986.
Cultural Significance
In Thailand, currency featuring the King is treated with extreme respect; stepping on a coin or defacing the image is considered a criminal act of lèse-majesté.
Condition Notes
Very Good to Fine; shows light surface scratches and circulation wear consistent with pocket change. No significant corrosion or 'zinc rot'.
Value Estimate
Face value is 1 Thai Baht (approx. $0.03 USD). Collector value for a circulated specimen is negligible, though it holds sentimental value as a memento.
Care & Maintenance
No specialized silver care required as it is copper-nickel. Avoid harsh chemicals; mild soap and water can remove surface dirt.
Similar Pieces
Often confused with the larger 5 Baht or 10 Baht coins, or older silver Baht coins from the early 20th century which were actually 65-90% silver.
Interesting Facts
King Bhumibol Adulyadej was the world's longest-reigning monarch at the time of his death in 2016; his image appeared on all Thai currency for seven decades.