Jiajing Bao Tong is one of the Ming Dynasty coins in China, which was minted in Jiajing (1522-1566). "Jiajing Bao Tong" is a square round coin with a diameter of about 2.5cm. The word "Jing" of Jiajing Bao Tong can be divided into oblique and vertical. There is a phenomenon that the copper color of Jiajing Baotong cast in Jiajing Dynasty is white, which is called "white copper coin". In the eighteenth year of Hongzhi (1505), the weight of money was changed to one yuan and two cents per article, and the quality of casting money was one kilogram of copper plus one or two tin. However, at the time of restructuring, Xiaozong had collapsed, Wuzong had succeeded to the throne, and the next year it was restructured into Zheng De; Therefore, Hongzhi Bao Tong didn't cast much money according to the system, but adding tin to cast money according to a certain proportion has become a method of drum casting copper coins during Jiajing and Wanli years. A large-scale Jiajing Bao Tong was discovered in Huize County, Qujing City, Yunnan Province. The money has a diameter of 57.8 mm, a diameter of 10.24 mm, an inner profile width of 3.5 mm, a thickness of 3.7 mm, an inner profile width ranging from 3.4 to 2.4 mm, and an inner profile thickness of 1. 12 mm, which is relatively heavy. Appraised by experts as a commemorative coin, it was cast to commemorate the opening of the furnace when Dongchuan Prefecture began to cast money during Jiajing period of Ming Dynasty. This coin provides important material data for studying the history of Huize coins, and has high collection and research value.
Zhu Houzong, Sejong of Ming Dynasty, was cast in Jiajing period. "Jiajing Bao Tong" is a round coin with a square hole, with a diameter of 57.8 mm, a through diameter of 10.24 mm, an inner profile width of 3.5 mm, a thickness of 3.4-2.4 mm, an inner profile thickness of12 mm and a weight of 465438+. 1On June 27th, 990, the quality inspection department of Huize Lead-Zinc Mine conducted sampling analysis on this coin. The coin contains 90. 18% copper, 0.584% aluminum, 0.532% zinc, 3% iron and 640 grams silver per ton. Appraised by experts as a commemorative coin, it was cast to commemorate the opening of the furnace when Dongchuan Prefecture began to cast money during Jiajing period of Ming Dynasty. This coin provides important material data for studying the history of Huize coins, and has high preservation and research value.