I bought the same Japanese 531 Raleigh from Michaels Cyclery in Ames IA in 1983. I don't remember the model, but they were all "frame only" products. Jerry is right. Just two models; one was a Crit frame and the other a tourer. I don't know how Michael came up with these odd frames, but they really were pretty nice, and you could equip them to order. I think they were pretty inexpensive too at around $170.00 for the frame. Funny thing though. The one I had didn't ride that well despite it's good fit and finish and I didn't keep it very long. Maybe Michael had an inside track on these frames. He was in charge of Raleigh team racing in those days.
Chris Van Scoyk
Akeny, IA