Hi Colin ... interesting to see the BSA pages .... I've had BSA's for over 40 years now, but normally the type with engines, and even had one of the 3 wheeler cars for while!
It is fascinating how wide the reach of the BSA empire was at one time (and how little remains now) ... I think their early lessons of adapting to grow and survive got lost in their later days.
Couldn't quite work it out - are you just an online museum or can we come and see the collection somewhere?
All the best
Jeff