I don't know what year the Tri-A was introduced and what years other models ended but the Tri-A is roughly equivalent to the old competition, comps and Comp-IIs. The superbe was definitely a step above but again I do not know what year that model disappeared. As others have mentioned there were uncatalogued models above the tri-A. It is a very nice Upper-Mid range bike perfect fit for the burgeoning triathlon market of the late 1980s. I have never seen the black and yellow version but I am sure they came in more colours than those posted even in this thread. It's a great bike, enjoy it.

Classic Nishiki

http://www.stevevance.net/nishiki/im...le_catalog.pdf