Thanks a lot for this info on bass collection guitars - like you I have just rebought (sort of) one of these.
I had one of the copies - a fretless white passive 4 string Maison bass, made in Korea I think, but still a really good guitar. I replaced it with a 2004 fender jazz fretless which has a much superior sound (better even than my 1977 fretted jazz).
But - still missed the bass collection type so after some hunting just bought a 1991 5 string fretted active sgc nanyo bass collection. After some setting up it plays and sounds great.
A couple of questions though if you have time?
If its a 5 string does that mean its an SB325?
Also - the controls work differently from my old one - a strange mixture of volume and tone. The top one seems to be an overall volume, the bottom three have a notch around mid-throw - one on the right also volume, the others tone. Any more to add to this?
Cheers rob