Hi i have an old road bike. Im trying to identify it to see if it is worth restoring or is it junk. it looks like the bike has been painted a few times, and there is no nameplate or any other identification except the serial number . it looks to be "b129088" and is stamped on the bottom of the BB. Description is as follows: Nicely lugged frame with lugged aluminum fork it looks like the downtube and seattube are aluminum and the rear fork and top tube are steel?; SR Aluminum crank arms, stem, handlebars; Thunderbird deraillers; SIW Japan rear hub. Any help anyone? Thanks