Well, unfortunately, that serial number is pretty far back, and isn't in our system now.
It sounds like a righty bass that someone bought and "convered" into a lefty, but there is no way for us to confirm this. It does happen often enough out there though, so it's a reasonable guess.
As for the "chorus" issue on the lower strings up on the higher frets, it is most likely because the neck pickup is too close to the strings, an easy fix.
Sorry for the delay in replying, didn't see this over the weekend, as I wasn't on the computer at all (I sit here all day every day, last thing I wanna do on my days off is sit here some more!

)