One-sik coin
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(1860-1874) 7.69 g
(1874-1888) 23 g
(1860-1874) 30mm
(1874-1888) 38.5 mm
Thailand | |
| Value | 1/16 Thai baht |
|---|---|
| Mass | (1860) 0.92 g (1860-1874) 7.69 g (1874-1888) 23 g |
| Diameter | (1860) 13.0 mm (1860-1874) 30mm (1874-1888) 38.5 mm |
| Edge | Smooth |
| Composition | (1860) silver (1862) brass (1860-1876) copper |
| Years of minting | 1860-1876 |
| Obverse | |
 | |
| Design date | 1876 |
| Reverse | |
 | |
| Design date | 1876 |
The sik coin (Thai: สิ้ก or ซีก) piece, or the four at coin was a fractional-denomination coin used in the traditional pre-decimal currency system of Siam (modern-day Thailand). The sik represented a value of 1⁄16 of a baht, equivalent to 1⁄2 of a fuang or 2 siao /2 pai. Positioned between the fuang and siao denominations, the sik coin formed an important intermediate unit within the non-decimal baht system used before the monetary reforms of the late 19th and early 20th centuries.[1][2]
Early sik coins were issued in the characteristic podduang (bullet-money) form, cast or hammered into pod-shaped lumps of silver or gold[3]. During later reforms under Kings Rama IV and Rama V, sik coins transitioned into modern flat, struck silver or copper-alloy coins, aligning Siamese currency with international minting standards. The denomination became obsolete following the adoption of the decimal baht–satang system, which replaced all traditional subunits including the sik.[4]
The sik coin of the 1876 series was the largest circulating coin ever produced[5]
- Evolution of sik
1962-silver
1962-brass
1962-copper
1876
