One-at coin
Denomination of the Thai baht
From Wikipedia, the free encyclopedia
The at coin (also spelled att; Thai: อัฐ) was a low-denomination coin used in the traditional pre-decimal currency system of Siam (modern-day Thailand). The at represented the unit known as the att or at, valued at 1⁄8 of a fuang or 1⁄64 of a baht. At coins were commonly issued during the Rattanakosin period and circulated widely as part of everyday small transactions. Early coins were cast in the characteristic pod-shaped "bullet money" (podduang) style[1], while later issues were struck as flat round coins as Siam modernized its currency system. The at, along with other non-decimal subunits, was discontinued when Thailand adopted the decimal baht–satang system in the early 20th century.[2][3][4][5]
- Evolution of at
1862
1876
1888
(1874-1888) 5.55 g
(1888-1905) 5.80 g
(1874-1888) 20 mm
(1888-1905) 24 mm
Thailand | |
| Value | 1/64 Thai baht |
|---|---|
| Mass | (1860-1874) 7.20 g (1874-1888) 5.55 g (1888-1905) 5.80 g |
| Diameter | (1860-1874) 29 mm (1874-1888) 20 mm (1888-1905) 24 mm |
| Edge | Reeded |
| Composition | (1860-1874) tin-copper alloy (1874-1905) copper |
| Years of minting | 1860-1905 |
| Obverse | |
 | |
| Design date | 1888 |
| Reverse | |
 | |
| Design date | 1888 |
