Nice, lugged hybrid frame. Looks like a nice versatile bike and you can set it up in several ways from commuting to touring. My guess on the year will be 1986-1987, because that was about the time those Sakae Roundtech chainrings (Sakae's answer to Biopace) were made and by few years later, the frame would be Tig-welded and not lugged. Great find, enjoy it. Not sure what component group you have there, but you might want to upgrade to Shimano Rapidfire STI shifters (M500 or better) circa late 80s/early 90s, because they will make your life much much easier.