My must be a very late one.
Its in the R48*** range, has a smooth wingnut (no logo), black undercoat, painted green and has all the original decals.
What does quill type and pedal boos mean? (I'm Dutch.)
Still have the original outer tyres (removed from bike) and I think I use a original inner tube.
BTW, I have seen 1 folding bike with BSA on its individual chain parts.