Hello - ocassional weekend rider type - first time poster here so bear with me. I have a serial number for you.
I have three old bikes that I bought in 1982. Norco and Nishiki. One Nishiki is the Ultimate - frame with sylized W - Serial Number KS 14607 - All campy record items with Campy dropouts. My other frame is the Nishiki Maxima with Columbus tubing which I understood was only sold as a frame. I built it into a fixy after realizing that I would never be a bike racer.
I remember that the Ultimate and Maxima frame were not in the regular catalogue but were on the price list available to the bike shops on a special order basis. I bought both bike and frame from a Marshall Wells hardware store in Smithers BC, Canada who sold Norco bikes and accessories. Love both bikes and ride them ocassionally still alternating with my Norco Magnum Special Edition 18 speed. I have a thoroughly worn out Kona Dew Deluxe commuter that is my main ride on the road (has fenders) and an early 90's Kona Lava Dome mountain bike for the mountains. I never really know what kind of riding I will do but have it covered.