One-satang coin
The Thailand one-satang coin is a currency unit equivalent to one-hundredth of a Thai baht. It is rare in circulation but used in banking transactions. The first satang coin was issued from 1908 to 1937, and featured a hole through the middle. It was made of bronze and measured 22mm in diameter, weighing 4.6g. It bore the name of King Rama VI. A coin in the same design was minted in 1939 with name of King Rama VIII, and had a mintage of 24.4 million. In 1941 the design of the coin changed , although it was still bronze with a hole. The diameter changed to 20mm and the weight to 3.5g. The hole was removed in 1942 as the coin's composition became tin, reducing its weight to 1.5g and the diameter to 15mm. Only issued in 1942, it had a mintage of 20.7 million. The design was changed on the coin, although it retained its specifications, in 1944. This coin had an issue of 500,000. The coin then fell out of circulation. It was reintroduced in 1987 as an aluminium coin weighing 0.5g and measuring 15mm  in diameter. This was the first one-satang coin to feature a portrait of a monarch, King Rama IX, which was sculpted by Wuthichai Saengngoen. A commemorative was released in 1996 to mark 50 years since of the reign of Rama IX, with a front-facing portrait of the King at his succession. In 2008, the current portrait of the King was inserted on the obverse.