The Colnago produced Nishiki was called the Maxima. I used to own a metallic blue one and still own a 60 cm metallic red one, both with yellow branding. Those are the only colors I've seen them in though perhaps there were other colors as well.
Mine has Superbe Pro brakes, derailers, dt 7 speed shifters, bottom bracket and crankset. Wheels are Dura Ace 7 speed freewheel/Mavic Reflex clincher. It's in almost new condition. Please contact me for more details.