JAPAN. Koban, ND (1736-1818). Genbun to Bunsei Eras. PCGS Genuine--Chopmark, AU Details Gold Shield. Fr-13; KM-C-22; JNDA-09-19. Weight: 13.09 gms. Stamps: jiu/cun. Lightly toned and circulated, with some minor, scattered marks. The noted countermark is a diamond-shaped punch on the reverse.