Thailand 10 Baht – Rama IX

B.E. 2531 (1988) | Early Issue Bimetallic | Key Date

Category: 256 – Coins: World

Obverse: Portrait of King Bhumibol Adulyadej (Rama IX) facing left with Thai script: ภูมิพลอดุลยเดช รัชกาลที่ ๙ · Translation: “Bhumibol Adulyadej – Rama IX.”

Reverse: Wat Arun (Temple of the Dawn) rising above the Chao Phraya River. Denomination shown in Thai and Braille dots, reflecting accessibility in Thai coin design.

Features: Issuer: Thailand · Year: BE 2531 (1988) · Value: 10 Baht · Bimetallic (Al‑Bronze center / Cu‑Ni ring) · 8.5 g · 26 mm · 2 mm thick · Segmented reeding · Designer: Eliezer Weishoff

Mintage: BE 2531 (1988) – 60,200 · BE 2532 (1989) – 100,000,000 · BE 2533 (1990) – 100 (extremely rare). Early issues are highly desirable among collectors of modern Thai coinage.

Thailand B.E. 2531 (1988) 10 Baht – King Rama IX – Early Issue Bimetallic Coin

A desirable early example of Thailand’s iconic bimetallic 10 Baht coin featuring the portrait of Bhumibol Adulyadej (King Rama IX). First introduced in B.E. 2531 (1988), this coin represents the beginning of Thailand’s modern circulating bimetallic coinage and remains one of the most collected modern Thai issues.

To help collectors evaluate the series, we have included additional comparison images of other B.E. 2531 coins. These coins were originally issued in distinctive green or blue mint packaging (see photos 7-18).

Collectors of the series recognize B.E. 2533 (1990) as the “top coin,” owing to its extraordinarily small mintage of just 100 pieces. B.E. 2531 (1988), meanwhile, is regarded as the second key date and the inaugural issue of the bimetallic 10 Baht.

Additional images of other Thai coins may be shown for promotional or comparison purposes. If any piece catches your interest, feel free to contact us for availability and details.


Obverse: Portrait of King Rama IX facing left within a circular border.
Lettering: ภูมิพลอดุลยเดช รัชกาลที่ ๙
Translation: Bhumibol Adulyadej – Rama IX

Designer: Eliezer Weishoff

Reverse: depicts the iconic temple **Wat Arun (Temple of the Dawn)** rising above the **Chao Phraya River**, one of Thailand’s most recognized landmarks. The denomination appears in both Thai and **Braille dots**, an innovative feature reflecting accessibility in Thai coin design.
Lettering: ประเทศไทย ⠂⠴ พ.ศ. ๒๕๓๑ ๑๐ บาท 10
Unabridged legend: ประเทศไทย ⠂⠴ พุทธศักราช ๒๕๓๑
Translation: Thailand – Buddhist Era 2531 – 10 Baht
Edge: Segmented reeding (5 reeds per section)

Mintage Information

B.E. 2531 (1988) – 60,200 minted – Royal Thai Mint – Approx. frequency 1.6%
B.E. 2532 (1989) – 100,000,000 minted – IPZS Mint – Approx. frequency 23%
B.E. 2533 (1990) – 100 minted – Only a handful known – Approx. frequency 0.17%

This production data highlights why early issues from this series are particularly desirable among collectors of modern Thai coinage.

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