I'm not sure that were ever any Univega built with Miyata's splined, triple butted (STB) tubing. I don't recall seeing any. By the time that Miyata introduced STB, Lawee seems to have refocused the Univega brand, with the better models being mid-range sports bicycles with aluminum frames, while the upper end, racing market was the realm of their new Bertoni brand. The top, steel, Univega models of the mid-1980s were the Super Speciale and Competizone. The Bertoni SL models incuded the Specialissima, Pro Victory and Corsa Mondial, which apparently were manufactured by Bianchi. Speaking of which, I'm surprised there has been no mention of the 1987 Bianchi SL models; the Mondiale, Giro and Super Leggera.