China, 1628-1629 AD., Ming dynasty, emperor Si Zong, 1 Cash, Hartill 20.235.

China, Ming dynasty (1368-1644 AD.), emperor Si Zong (1628-44), reign title: Chong Zhen (1628-44 AD.), issued 1628-1629 AD.,
1 Cash (26,7 mm / 4,61 g), (1,24 quian), cast, square center hole,
Obv.: 崇 祯 通 寶 , Chong Zhen Tong Bao, type 1.1 Zhen, closed head one dot tong.
Rev.: plain (square center hole).
Hartill (type 1.1) 20.235 (rarity 15, very common) ; FD 2025 .

At first of this reign each coin weighed ca. 1,3 quian, but by 1630, coins minted in the north weighed 1 quian, while some of those minted in the south weighed only 8 fen or less.