I have been commuting on a 12 speed Nishiki Olympic for a few months now. My serial # is CB803355 made in Taiwan. I just had to replace the Shimano index derailleur and could not tell if it was original, but the front derailleur and brakes are Shimano. I can not figure out the serial code with the figures on page 1, I didn't think it was that old. Any help?
*edit- It has a black and white Nishiki decal on the front