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
I believe that is a Giant serial number, so that is not going to help much. Just look up the date codes on components, many of them are dated: cranks, derailleurs, stem, brake calipers, etc. Go to vintage trek site for details.