Here's a kinda interasting one USA made Nishiki Bravo one of the last lesser mid level Bikes made in the US circa 1993, pretty nice welded Cromoly steel frame.. Basically none original except for US Wenmaum wheels and Nishiki frame. It was a dumpster bike with some pretty swag SIS components, so I rebuilt upgraded it with a vintage correct Mountain LX group off a donar. It has what appear to be two serial numbers on the BB N60104393 and R90476065. The first kinda matches the bike I have no clue on the second one.