Two large Chinese characters Ban Liang ("Half an ounce"), small characters, no rims / Blank. 20.5mm, 0.5 grams. Hartill #7.10.Extremely nice for these!A chinese ounce (liang) weighs about 16 grams. The earliest "Ban Liangs" weighed half that much - 8 grams, but the later pieces, like this one, weighed much less. Pieces issued between 200 and 180 BC were very small, thin and crude and popularly known as "elm-seeds" because of their small size.The Han Dynasty (206 BC - 220 CE) was the second imperial dynasty of China, preceded by the Qin Dynasty (221-206 BCE) and succeeded by the Three Kingdoms (220-265 CE). It was founded by the peasant rebel leader Liu Bang, known posthumously as Emperor Gaozu of Han. It was briefly interrupted by the Xin Dynasty (9-23 CE) of the former regent Wang Mang. This interregnum separates the Han into two periods: the Western Han (206 BCE9 CE) and Eastern Han (25-220 CE). Spanning over four centuries, the period of the Han Dynasty is considered a golden age in Chinese history. To this day, China's majority ethnic group refers to itself as the "Han people".This coin is unconditionally guaranteed to be authentic