Japan, Tokugawa Shogunate (Edo, Kinza) electrum 2 Shu ND [1832-1858] – Ninko (1817-1846) or Komei (1846-1867) 1.60g. 13x8mm. VF/VF.Tenpo Ni-Shu-Ban-Kin. Chopmark.KM C# 18.