Originally Posted by T-Mar

A Giant manufactured Nishiki would have a date code or serial number starting with a 'G'. Norco was designer and distributor for the Canadian market Nishiki, which would typically have a Giant or Kawamura or Kawamura serial number. The Kawamura built Nishiki for the Canadian market typically had a serial number starting with 'C'. Yamaguchi had a serial number format starting with a 'Y' but the 2nd character was numeric.