拍品描述： 云南省5.75两半中宝省份中型银锭。无字样，中心水波纹状纹路向边缘延展。轻微磨损，但边缘保存完好，一边翼略有弯折。诱人斑驳石板灰色表面，带些微蓝光。CHINA. Henan Zhongbao. Provincial Middle Sized Ingots. Silver 5.75 Tael Ingot, ND. CHOICE VERY FINE。214.59 gms. cf.BMC-Class XXIII Group A #190. Uninscribed but with nice ripple pattern in the center working towards the edges. Slightly waisted with well formed end walls with one wing just slightly bent. Attractive mottled slate patina with just a hint of blue sheen。