I've resurrected this thread because as some of you know I'm selling off my surplus BX parts now I no longer have the car.
I've got a pair of unused spheres that fall into the category being discussed here, they're not boxed.
I bought them last year and never got round to fitting them. As has been mentioned in this thread these have printed in black on the bottom:
"BX AR 40 BAR"
"SP974 05/03"
Anyone care to comment before I put them on Ebay? Gibbo.