开元通宝。CHINA. Tang Dynasty. Kai Yuan, ND (732-907). FINE. 开元通宝。重 3.61 克。正面开元通宝,背有横杠。反面顶部带横槓。图文清晰,部分币面有绿色包浆。CHINA. Tang Dynasty. Kai Yuan, ND (732-907). FINE.Hartill-14.14a. Weight: 3.61 gms. Obverse: "Kai Yuan tong bao"; Reverse: horizontal bar (nail mark) at top. A fully legible coin with partial green patina.