甘肃通渭发现大泉五十异品祁永忠笔者曾从一农民手中购得两枚大泉五十异品，介绍如下：其一为直径２．５、厚０．１５、穿０．８厘米，重５克（图１）。该钱生坑绿锈，背郭内四周匀称布有四个符。其二为广穿大泉五十，径２．５、厚０．１、穿１．２厘米，重３克（图２）。... Gansu Tong Wei discovered that the spring of fifty different Qi Yongzhong I had bought from the hands of a peasant two big spring fifty different foreign products, described as follows: one for the diameter 2.5, thickness 0.15, wear 0.8 cm, weight 5 grams (Figure 1). The money green pit rust, back within the fabric evenly distributed four characters. The second is widely worn big spring fifty, diameter 2.5, thickness 0.1, wear 1.2 cm, weight 3 grams (Figure 2). ...