I bought a SB301 in 1993 (I think it's a '91 model) for £400 and still have it, though now it's got EMG pups and electronics.
I don't know if I'm adding anything new to what's already been written, but from what I can remember of the original Bass Collection basses imported by the Bass Centre, there were three ranges over the years - the SB300, SB310 and finally the SB320 range, each range an 'update' from the previous one. They also had a couple of very nice Jazz copies which were pretty expensive and by all accounts really nice to play - I'd be all over one like a shot if I ever found one.
The 300 range had something like 6 models: a passive 4 string, an active 4 string, active 4 string with an ebony board and brass nut, a 5 string and a high end mahogany bodied, maple topped 4 string. There was another maple capped bass but I can't remember what the core wood was. 4 stringers were P/J, the 5s were J/J configuration.
The 310 range was very similar and may have just removed the passive base model. I think they had slightly different hardware too.
The 320 range dropped the ash bodies for sen maple and see through colours with gold hardware. I think by this stage there were just the 4 and 5 string models (320 and 325 probably) but I could be wrong.
I don't recall there being a 330 model but Bassist magazine ran a competition to design the new range so that could have been the 330 range. I've no idea if it ever went into production before the company went bust.
As for name users, there was Shakespeare's Sister's bassist (Clare somebody?) as already mentioned, Culture Club's bassist, Nick Fyffe and Chris Wolstenholme from Muse.
Anyway, here's mine...
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Dave