A $40 online classifieds find, in ok shape. Mostly original but it has a Weinmann 519 rear rim on a bolted hub, and a Deore II front derailleur, and newer Tourney lever shifters
Weight: ?lbs, fairly light
Frame: 1989 22.5" Tange MTB double-butted CrMo, Dualtone Blue Smoke/White colorway. Serial XXXXXXXXX
Fork: 100% CrMo UniTrac with straight oversize taper blades
Handlebars: Diamondback alloy 0° rise, 10° sweep, 1"/25.4mm.
Grips: DB
Stem: Tioga T-Bone 22.2mm / 1" quill stem, maybe 6°?
Headset:
Saddle: Mongoose. Originally Avenir RacingGel Lycra
Seatpost: Delta DP 300mm
Seat Collar: DB QR
Shift/Brake Levers: Shimano ST-EF29-L (L) Shimano ST-EF29-7 (R). Originally Shimano Exage Mountain LX 3x7 SL-M453 + BL-M451 ???
Pedals: originally Diamond Back alloy body/cage
Brakes: Shimano BR-M454 Canti (F/R)
Pads:
Bottom Bracket: Shimano cartridge?
Chain:
Crankset: Shimano Exage Mountain LX, 175mm, 46/36/26t FC-M452
Cassette: 6-speed ?-28t (Originally Shimano Mountain LX 7-speed 13-30t)
Front Derailleur: Shimano Deore II FD-MT62 3x
Rear Derailleur: Shimano Mountain LX RD-M462 x7
Hubs: Shimano Mountain LX HB-M451 (F) / R (originally Shimano Mountain LX FH-M452 rear)
Rims: Araya RX-7 (F), Weinmann 519 (R) (originally Araya RX-7 both)
Tires: Kenda 26x1.95" (F/R) (originally Tioga Farmer John Cousin 26x1.95" F/R)
Original catalog specs page
Wheelset: ? (F), ? (R)
spec sheet + some of my measurements
Seat Tube (C-T): 22.5" (572mm)
Seat Tube (C-C): 21.5" (546mm)
Top Tube, Actual: 23.2" (590mm)
Head Tube Angle: 70º
Seat Tube Angle: 73º
Chainstay Length: 16.9" (430mm)
Headtube Length: X" (XXXmm)
Bottom Bracket Drop: X" (Xmm)
Bottom Bracket Height: 11.8" (300mm)
Standover Height: " (mm)
Front Center: X" (XXXmm)
Wheelbase: 42.9" (1089mm)
Stack: XXXmm
Reach: XXXmm
Fork Rake: 1.77" (45mm)