I believe that TSD acquired the USA distribution license for Rossin for the 1987 model year, to replace Ciocc. Regarding models it is obviously not a Ghibli. It would not appear to be the standard SLX model, as these used internal routing for the rear brake cable, an investment cast, bridgeless BB shell, a fornt derailleur hanger and extensive chrome. Of course, this is relatively easy to verify by removing the the bottom bracket and check the inside ends of the tubes for the helical ridges indicative of SLX. That narrows it down to SL and Cromor. I don't recall the Cromor model having the socket style stay caps, so I'm leaning towards towards the SL model.