Joined: Jan 2008
Posts: 23,639
Likes: 1,106
From: Mans of NC & SW UT Desert
Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more
Search is your friend. There is a thread that decodes Univega serial numbers. And in addition, there is always looking up the component codes. If it is friction shifting, I would guess early to mid 1980s.