There's a
Nishiki Manitoba on CL, and I can't find any info on it, beyond a very low res page on mombatbicycles.com. Seller says it's a 1990, SN# 119(0? 8?)363.
It's filthy, and a bit chewed up, but no real rust, new tubes and tires, and only $25 (if it's still there). Any help would be greatly appreciated.