http://cgi.ebay.com/Alembic-Custom-4-string-Bass-Guitar-mint_W0QQitemZ230339065232QQcmdZViewItemQQptZGuitar?hash=item230339065232&_trksid=p3286.c0.m14&_trkparms=66%3A2%7C65%3A3%7C39%3A1%7C240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50
I remember the FTC, or at least some discussion about it. It was ordered like that. Unusual, for sure.
That's one of Adams' customs and is being discussed here (http://club.alembicguitars.net/index.php?topic=11799), where there is also a link to the FTC thread.