Introduction to Three Baht Coins: Three Baht Coins were minted from the first to fifth years of the founding of Emperor Wu of the Western Han Dynasty (140 BC to 136 BC). The two characters "three baht" in Qianwen are horizontal and have a conveying form. The diameter of the money is about 2.2 cm and the weight is 1.8-2 grams. The back is plain. Nowadays, three-baht coins are divided into two types: those with outer outline and those without outer outline.