nice score Dave. she cleaned up very nicely, and yes very lucky on the decals. do I see a Suntour 4050/3040 drivetrain? I believe that and the black rings make it an '88. the frame is lisdted as Tange DB in SuperSet design, but I believe that may be only the main tubes. the next model up is listed as Mangalloy stays so I am not sure if yours would be HiTen, Mangalloy or ChroMo. but whatever it is it should ride very well.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk