The ad doesn’t mention the serial number, but it looks a lot like this one:
http://club.alembic.com/index.php?topic=8430.msg98613#msg98613I think this one has been up for sale a few times in recent years. The Low End bass Shop posted one like it, then a person on Long Island posted a similar bass. I think the recent Reverb post is by J9 here at the the Alembic Club. Nice looking bass.