I recently bought what is labelled as a Nishiki but haven't been able to identify it. The markings on the bike don't seem to match conventional serial numbers as they are DS 61 and 252129. I think I have been able to identify the derailleur as a SunTour Honor 1100 made in 1976 onwards. The shifters and derailleurs all have SunTour on them. The headset has KA60 on it and there are markings that say Japan. There is a sticker that says Made In Taiwan. Anyone have a guess?

Nishiki - Album on Imgur

Thanks!