i think it is a 1991 and completely original except for the stem, that was replaced when new by the girvin
if the stem's been changed (which it obviously has) then so must the bars have been also. A-Stars had a kooky 28.6mm bar/stem interface and Flexstems are 25.4.
Make sure you add some wheel skewers before ripping any monos.
* '89 Nishiki Alien 17/19"
* Mantis Valkyrie-EC 18"
* Titan 1/2 Trac 18" (Stay tuned to this channel...)'89 Titan 1/2 Trac, '90 Nishiki Alien ACX (NOS, M735), '90 Pearson Kea, '91 Nishiki Alien ACX (M900), '91 Haro Extreme Comp (M735), '91 Milazo Rock Comp II, '91 Mantis XCR-EC, '92 American Comp-Lite (XC-Pro), '12 Soma B-Side (650B), '14 Cannondale Evo Hi-Mod 1 DA9000, '15 Cannondale Trigger 27.5 Carbon 2 (XTR)