《历代古钱图说》70页后有大型开元一枚，径约30毫米，标无定价。系张叔驯旧藏，实物早年已带至美国。当时定为建中时赵赞采连州白钢所铸，以一当十。但实际上赵赞仅提出建议，并未正式实施。据张公午先生回忆，此钱水红铜，平夷熟旧，确属真品，因存世仅见一枚，所以被泉币界 “Ancient money map that” 70 pages after a large Kaiyuan, a diameter of about 30 millimeters, the standard no pricing. Department of Zhang Shu tame possession, in-kind brought to the United States early years. At that time, Zhao Zongzhao was named Jianzhong when he was founded by Bai Steel Steel. In fact, Zhao Zan only made recommendations and did not formally implement it. According to Mr. Zhang Gongwu memories, this Qianshui copper, Pingyi cooked old, indeed a real thing, because of surviving only see one, so was the currency sector