Actually, several of those "above models" are Canadian market models, which often differed substantially from those offered in the USA market. Nishiki models were independently spec'd by the importers for the various markets, which accounts for the variation. In Canada, the importers were originally Shields and later Norco. The 3rd bicycle shown in Randy's post is a late 1970s Shields Nishiki while the others are early to mid-1980s Norco designed Nishiki.