I'm finding date code PA on the components. According to the date code, that puts them in 1991. First, I had no idea that they made STI Brifters in 1991. Second, that makes this maybe a 1991/1992 bicycle?
Does anyone have a Univega SN database? The only number I can find stamped into this is "050" and that doesn't match up with any serial numbers I see on the internet for Univega. How rare is this thing?