The component mix suggests a 1980's mid-range model and the seat post size suggests plain gauge tubing. From what I can see in the pics, it has a single set of bottle bosses, no front derailleur hangers and gear cables that route under the bottom bracket. This points mid to late 1980s and corroborates mid-range, but the paint and decals seem to put it very late 1980s or early 1990s. Having pics of drive side, particularly the derailleurs, would be a big help.