二、铜元铸地和时间的鉴定 鉴定铜元的铸造地点和铸造时间，是铜元研究的重要方面。 清末至民国时期所铸铜元，大多标有铸局或地名，如户部、度支部、××省造、××军政府造或在币正面中心铸省名简称，但也有相当部分钢无不注明，成为一种“无主币”，因此必须经过鉴定来区别 Second, copper castings and identification of time Identification of copper casting location and casting time is an important aspect of copper research. Copper coins from the late Qing Dynasty to the Republic of China were mostly castings or place names, such as the Ministry of Housing and Municipal Branch, XX Provincial Department of Construction, ×× Military Government or the abbreviation of the provincial name in the frontal center of the coin, but also a considerable portion of the steel Ming, become a “no main currency,” so must be identified to distinguish